fart      
 verb [ I ]  very informal uk/fɑːt/ us/fɑːrt/
 放屁
to release gas from the bowels through the bottom
 Phrasal verb   
fart around 闲荡;浪荡;无所事事
to waste time doing silly or unnecessary things
  Stop farting around and help me clean up. 别闲荡了,来帮我收拾吧。 
 fart  
noun [ C ] uk/fɑːt/ us/fɑːrt/
  (PERSON)      
  offensive令人厌烦的人;讨厌的人 
a boring, annoying, or unpleasant person
  He's a pompous old fart. 他是个自负又烦人的老东西。 
   (GAS)      
 very informal屁;放屁 
an escape of gas from the bowels
  to do a fart 放屁