belt up
phrasal verbbelt up (British English)
- (North American English buckle up)(informal) to fasten your seat belt (= a belt worn by a passenger in a vehicle)
系上安全带 - Get in the car and belt up.
上车并系好安全带。
- Get in the car and belt up.
- (informal) used to tell somebody rudely to be quiet
闭嘴；住口 - Just belt up, will you!
你安静点行不行！
- Just belt up, will you!