(as) sober as a judge
Other figures associated with sobriety are occasionally used in place of "judge," typically ecclesiastical figures such as "deacon," "priest," "parson," etc.
1. Stoic and reserved, perhaps even somber. Anita has been as sober as a judge ever since she heard of Marshall's death. The coach stood at the side of the field, sober as a judge, as the clock counted down on his team's championship ambitions. When I walked into the boss's office and everyone was sober as a judge, I knew I was being laid off.
2. Calm and rational. We need someone who can consider these issues without their emotions interfering—you'll need to be as sober as a judge from beginning to end! I don't want you in this meeting if you can't be sober as a judge. The last thing I want to do is referee a fight between the two of you. I don't think we should discuss this now, while we're all worked up about it. Let's reconvene in a few days when we're sober as a judge.
3. Not at all intoxicated by drugs or alcohol. I haven't been drinking at all, I swear! I'm as sober as a judge! Bill tried to convince me he was sober as a judge, but I didn't buy it—that's why I didn't let him drive home. John's remained sober as a deacon ever since the car accident three years ago.
a drunk mind speaks a sober heart
proverb A person who is inebriated is less inhibited and thus more likely to say what they truly think or feel. Commonly attributed to French philosopher Jean-Jacques Rousseau. A: "After about our fourth or fifth drink, Sarah suddenly turned to me and confessed that she'd always loved me." B: "Wow! A drunk mind speaks a sober heart, I guess!" We were at the Christmas party, we all had had too much to drink, and suddenly I just started pouring out all the anger and frustration that had been building up in me all year. I guess a drunk mind speaks a sober heart. I know that a drunk mind speaks a sober heart, so whenever I need to get the truth out of someone, I just open a bottle of wine!
a sobering thought
A thought or idea which is dispiriting, depressing, or traumatic. It's a sobering thought when you consider how many people go without clean water every day. The renovation could end up taking three months, instead of three weeks? Well, there's a sobering thought. A: "You know, you might not get into your first-choice school." B: "Gee, thanks, Dad, that's a sobering thought."
appeal from Philip drunk to Philip sober
To urge one to rethink something. The phrase refers to King Philip II of Macedon, who made an unwelcome decision and was challenged with an appeal to "Philip sober." If you're unhappy with his decision, then why don't you appeal from Philip drunk to Philip sober? She can't be serious with this. I think she'll change her mind if we appeal from Philip drunk to Philip sober. I'm sorry, sir, but because I believe this is a terrible decision, I simply must appeal from Philip drunk to Philip sober
be (as) sober as a judge
1. To be stoic and reserved, perhaps even somber. Anita has been sober as a judge ever since she heard of Marshall's death. The coach was sober as a judge as the clock counted down on his team's championship ambitions. When I walked into the boss's office and everyone was sober as a judge, I knew I was being laid off.
2. To be calm and rational. He's usually as sober as a judge, so I'm confident that he'll make a sound decision. I don't want you in this meeting if you can't be sober as a judge. The last thing I want to do is referee a fight between the two of you. I don't think we should discuss this now, while we're all worked up about it. Let's reconvene in a few days when we're sober as a judge.
3. To be not at all intoxicated. I haven't been drinking at all, I swear! I'm sober as a judge! Bill tried to convince me he was sober as a judge, but I didn't buy it—that's why I didn't let him drive home. John's remained sober as a deacon ever since the car accident three years ago.
cold sober
Completely sober; not intoxicated to any degree by drugs or alcohol. I'm cold sober, so I'll drive us home. No, I'm not high—I've been cold sober from the day I started working here! Jenna was cold sober that night at the bar. Maybe she can tell us what really happened.
sober up
1. To recover from the effects of alcohol or drugs on one's body or mind. I need to sober up soon—I can't go into work staggering around like this! We decided to go take a walk in the cool night air to sober up a little before heading home.
2. To help or cause someone to recover from the effects of alcohol or drugs on one's body or mind. In this usage, a noun or pronoun can be used between "sober" and "up." Go make a pot of coffee! We need to sober Kevin up before his parents come back.
3. To cease being happy, merry, flippant, or distracted; to become serious or solemn. When the chief put the pictures of the victims up on the white board, the whole room sobered up.
4. To cause or compel someone to cease being happy, merry, flippant, or distracted; to make someone serious or solemn. We were all goofing around during practice until the coach threw a chair through the window—that sobered us up straight away.
5. To give up drinking alcohol or taking drugs as a means of dealing with or overcoming one's addiction. I sobered up ten years ago to save my marriage, and I haven't looked since. Instead of simply throwing everyone in prison, why not offer programs to help some of these addicts sober up and start leading productive lives?
stone sober
Completely sober; not intoxicated to any degree by drugs or alcohol. I'm stone sober, so I'll drive us home. No, I'm not high—I've been stone sober from the day I started working here!
stone-cold sober
Completely sober; not intoxicated to any degree by drugs or alcohol. I'm stone-cold sober, so I'll drive us home. No, I'm not high—I've been stone-cold sober from the day I started working here!
wanton kittens make sober cats
proverb One who behaves wildly in youth often shows more restraint in adulthood. I wouldn't worry too much about your son's interest in partying—wanton kittens make sober cats most of the time.
Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.
*sober as a judge
 1. Cliché very formal, somber, or stuffy. (*Also: as ~.) You certainly look gloomy, Bill. You're sober as a judge. Tom's as sober as a judge. I think he's angry. 
2. Cliché  not drunk; alert and completely sober. (*Also: as ~.) John's drunk? No, he's as sober as a judge. You should be sober as a judge when you drive a car.
sober someone up
 1. Lit. to take actions that will cause a drunken person to become sober. some coffee ought to sober him up. He tried to sober himself up because he had to drive home. They tried to sober up the guys who had been out all night. 
2. Fig. to cause someone to face reality. The harsh reality of what had happened sobered him up immediately. The arrival of the police sobered up all the revelers.
sober up
to recover from alcohol or drug intoxication. Barlowe had one hour to sober up and get to the station. It took him a while to sober up.
stone(–cold) sober
 and cold soberabsolutely sober. I am stone-cold sober, or I will be by morning anyway. I found the secret to waking up cold sober. Don't drink.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.