let yourself go

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let (oneself) go

1. To behave in a wild or uninhibited manner. I was surprised that she let herself go at the party—she's usually so shy and reserved.
2. To fail to maintain an attractive physical appearance. A: "I was surprised to see that he had gained so much weight." B: "I know, he really let himself go after college."
See also: go, let

let go

1. To stop physically holding on to someone or something. In this usage, a noun or pronoun can be used between "let" and "go." If you let go of the ledge, you'll fall! The baby refused to let go of the rattle. He let the rock go, and it was a long time before we heard it hit the bottom.
2. To fire or dismiss an employee. In this usage, a noun or pronoun can be used between "let" and "go." I'm worried that they'll let me go once this special project is over. I heard they're going to let go a lot of employees involved in the scandal.
3. To release someone or something from custody. In this usage, a noun or pronoun can be used between "let" and "go." We did bring him in for questioning, but we had nothing to charge him with, so we had to let him go. What time did you let go the prisoner?
4. To stop pursuing a particular desire or attempting to maintain a particular situation and accept things as they are. In this usage, the phrase is often "let it go." He's never going to clean the kitchen as diligently as you would—just let it go. It's been 10 years, Ken. I think it's time for you to let go and move on.
5. To relax and not focus on one's responsibilities or stresses. I think I just need a weekend where I can let go for a while and not worry about what's going on at work.
6. To make noise in a sudden, fierce, and/or uncontrolled manner. The trapped wolf let go with a bone-chilling howl.
7. To launch into a verbal attack or reprimand. I don't know what made him so angry, but he suddenly let go with a string of expletives.
See also: go, let

let yourself go

1 act in an unrestrained or uninhibited way. 2 neglect yourself or your appearance; become careless or untidy in your habits.
See also: go, let

ˌlet yourself ˈgo

1 behave in a relaxed way without worrying about what people think of your behaviour: Come on, enjoy yourself, let yourself go!
2 stop being careful about how you look and dress, etc: He has let himself go since he lost his job.
See also: go, let
References in classic literature ?
You are nearer his age, and if you let yourself go I am sure you are sensible.
People don't respect you if you let yourself go too cheap.
Looking like you've let yourself go is about to get trendy.
It gets hard when the likes of weddings and christenings come up not to let yourself go.
But, if you do not get it, you cannot just let yourself go out with a whimper.
is an loss Their best known songs include I Like It, I Got To Sing, Get Up and Let Yourself Go.
You can't afford to just let yourself go for five or six weeks.
Be Consumed commercial, as well as the Kangaroo Island s Let Yourself Go ad.
I always look after myself in the summer which is the time when you can let yourself go a little bit.
You need to be on your toes, enjoy the atmosphere but be careful not to let yourself go," he laughs saying one young girl had to be stopped from getting on stage last week.
She was like 'Now love, don't let yourself go, men are very visual and I think it's important you wake up in the morning and get yourself together, don't slop around the house all day in your pajamas,'" Kerr remembered her grandmother telling her.
I can tell you're having second thoughts about what to do next, that's no bad thing Cancer and you should let yourself go down that route, yes even if there are those who could get annoyed.
Glencove Marina and Let Yourself Go step up in trip while Mossbank, Notre Pere and Siegemaster are all engaged.
But with a film like this you can't help but suspend disbelief, once you let yourself go and stop letting your brain ruin things, this movie isn't half bad.