Genereally means bastard, but not in the literal term. Just an annoying person who you don't like or who has done something stupidly irritating. Most comonly known from Mean Girls.
Sid had been sleeping in his bed for a week before he realized that it was covered in sex sheets; he immediately rinsed himself in acid and burned the sheets.
to ejaculate.
origin: a reference to shooting skeet; madepopular when, after the deaths of millions of women, it was discovered that Chuck Norris ejaculates shotgun shells.