A fart. Short for 'pre-defecation'.
"You think I like working in this stifling skunk mascot costume, covered in sweat and smelling my own pre-def!?"
(from skit showThe Dessert)
Sidetrashed - getting distracted or forgetting to do what you had intended due to intoxication.
I was cooking up a pot of ramens while Bubba was out gettin' another case of PBR and got sidetrashed lookin' for my sack of weed. Damn near burnt the whole house down.