A homo fart is a guy blowing off a semen-filled fart.
"Did you just blow a homo fart?" asked Nathan.
"Er... of course not," stammered Luigi.
"I can smell the jizz, dude," said Nathan.
Luigi turned bright red and ran away.
The sound one makes with his or her mouth while pretending to do martial-arts moves, sword attacks or anything requiring a "fast movement" sound.
My kids annoy the shit out me with constant homo farts for atleast an hour after an episode of Power Rangers.