Oxford Advanced American Dictionary

Definition of fart verb from the Oxford Advanced Learner's Dictionary

fart

verb
fart pronunciation English fɑːt fart pronunciation American fɑːrt
 
[intransitive] (taboo, slang) to let air from the bowels come out through the anus, especially when it happens loudly
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 A more polite way of expressing this is ‘to break wind’.
Phrasal verbs

fart around

(British English also fart about) (taboo, slang) to waste time by behaving in a silly wayStop farting around and give me a hand with this!