Pass gas 排气?

pass gas 放屁

It must be something I ate at lunch that made me pass gas all afternoon.肯定是我中午吃的什么东西，弄得我一下午都在放屁。

fart 放屁；屁

He farted in front of everyone, and he acted like nothing had happened.他在大家面前放了个屁，然后表现的跟什么事都没发生一样。

fart around 瞎折腾；闲荡；浪费时间

Stop farting around and get a job! 别瞎混了，找份工作吧！

break wind 放屁

Someone in the elevator broke wind. It smelled terrible. 有人在电梯里放了屁，臭死啦。