A buttwink is when a person flexes their anal sphincter, causing their anus to visibly contract, effectively "winking" with their asshole. Buttwinking can be performed as an obscene gesture, or in a sexual context it can be either a sign of affection or a greeting.
To buttwink, simply use the same muscles used to defecate to flex your anus.
This act should not be confused with mooning (merely exposing your anus) since buttwinking is considerably more rude.
As Sensei Doug walked to his dojo, the rude employees of a strip mall store lowered their drawers, pointed their behinds towards the window, and contracted their assholes to buttwink at the passing martial artist.
The character Jim Halpert uses from "The Office" to fuck with Dwight Schrute during a customer sensitivity drill over the phone in front of Michael Scott.
Jim Halpert: Hi, This is Bill Buttlicker and I'd like to buy some paper.
A word that pertains to someone or something that "kicks butt".
However, recently, the word has devolved to be used as a noun, adjective, verb, and even an idiom. In reality, buttkicker is simply the grammarically incorrect way of saying "kicks butt".
Sam: When your friend tries to make good roasts but then ends up failing: buttkicker.
Tom: STFU Sam you degenerate that isn't how you say it.
When you have to pee in a movie but don’t want to miss anything, and must do the following mental equation: will the amount I have to pee cause enough discomfort to diminish my attention capacity for the remainder of the movie to an extent which is greater than the amount of the movie I would miss by making a mad dash to the restroom.
I saw Satantango last night, wonderful film but by the 5th hour I had to start doing pee calculus.
Short-hand for the word floccinaucinihilipilification, meaning the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).