Instant messaging lingo.
During an online conversation if one finds something funny, but not funny enough to laugh, one might have a very slight outburst of breath from the nose. This is a 'ffins.' AKA a reversed sniff.
A word for those who are sick of people that say lol, lmao, and rofl every single thing.
A subtle way of telling someone online that you found what they said funny, but you're not laughing.
screenname1: i love airplanes, ive got book s and magazines of them
screenname1: im a geeeek!
screenname2: ffins.. yahh, you are :P