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。