When you (a dude) are sitting down and fart, and the air comes forward and tickles your testicles. Can leave behind a certain odor on your privates. Also a general expletive.
A disorder marked by abnormal abdominal discharges from the ass and typically manifested by sudden, brief episodes of diminished sphincter control, involuntary flatulence, and sometimes severe anal explosions.
Tobin would be a great guy to date, but he does suffer from fartilepsy so be forewarned.