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tighten something up
to make something tighter. Tighten your seat belt up. It looks loose. Can you tighten up all the bolts?
1. Lit. [for something] to get tighter. The door hinges began to tighten up, making the door hard to open and close. His grip around the handle tightened up and he refused to let go.
2. Fig. [for someone or a group] to become miserly. The government tightened up and our budget was slashed. We almost went out of business when we couldn't get credit because the bank tightened up.
3. Fig. [for someone or something] to become more restrictive. The boss is tightening up on new hiring. There are more rules and the people who enforce them are tightening up.
1. To make something tight or tighter: I pulled on the ends of the string to tighten up the knot. The mechanic tightened the bolts up with a rachet. This exercise will tighten up your stomach muscles. Tighten your belt up so your pants don't fall down.
2. To become tight or tighter: I knew I had a fish when the line suddenly tightened up. After the run, I walked around the track so my muscles wouldn't tighten up. I tightened up on the handlebars as I went over the bump.
3. To make something more strict or secure: The government is trying to tighten up the tax code. The country has tightened its borders up to prevent drug smuggling.
4. To become more strict or secure: Airline security has tightened up, and now all luggage must be scanned.
5. To make something more disciplined: The company is tightening up their management in an effort to reduce wasteful spending. The author has tightened the story up by deleting irrelevant details.
6. To become more disciplined: The team has tightened up under the leadership of the new coach.