fart 
(färt) Vulgar Slang
(färt) Vulgar Slang intr.v. fart·ed, fart·ing, farts
To expel intestinal gas through the anus; break wind.
n.
Phrasal Verb: 1. An often audible discharge of intestinal gas.
2. An annoying or foolish person.
fart around
To fool around; fritter time away.
[Middle English farten, from Old English *feortan; see perd- in the Appendix of Indo-European roots.]