(noun) a flatus expelled through the anus that delivers a sharp blow or smack, as if by an open hand or something flat. And smelly.
(Verb) to strike sharply with an odor not of this world so as to render your opponent, frat brother or wife dazed.
Incorrect Uses: verb stating that someone was slapped in the face so hard that gas was released. That would be a slap-fart, not a slapfart.
Dear God! That slapfart you just ripped left a red mark on my face and nearly gave me whiplash.
slapfartSBDSILENT BUT DEADLYSHARTCLEVELAND STEAMERLAURAPOTTER
when you hold back the power of a monstrous sneeze and it comes out of the other end.
See also 'snit' - when the 'snart' went a little further than you expected.
I've been non-stop sneezing all through the pastor's sermon, thank God they haven't gone so far as a snart, I'd be mortified.