When someone says "Queef on my birthday" they usually mean that something bad or really awkward happened. This term is usually used by Skaters, Snowboarders, Surfers or Longboarders. Sometimes when the situation wasn't as bad then they say "Queef after my birthday".
Degnarly: "Dud remember when that girl caught you staring at her ass?"
Vestigialman: "Yeaaah man that was like a Queef on My birthday mannn."
Degnarly: "Yeah Man that was not sick man that was awkward man"
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).