1. An occurence, remark, reply, or
otherwise any given situation which genuinely causes momentary distress or disdain
to the point that one tightens his or her sphincter, as if preparing to be kicked
in the ass. (Also spelled using hyphens, like so; Kick-In-The-Ass, so as to accentuate that the phrase is to be used, or acknowledged as one word.)
2. Literally, a kick in the ass.
1. After working all week, and breaking his back for an
ungrateful boss, Rob's paycheck was a real kick
in the ass.
2. When Rob bent over to pick up his paycheck, his boss gave him a kick
in the ass.