Big female butt. Usually found on overweight midwestern church ladies clad in polyester pants. Somehow PSA is nearly always on short gray haired "single" women.
More scientifically accurate, Potassium Yttrium Sulfide, this spells KYS. If somebody tells you this, they either respect you enough to shit on you or really fucking hate you.
Doctor: I think you're retarded.
Retard: What can I do doctor?
Doctor: One 10mg pill of potassium yttrium sulfur should be sufficient.
Retard: thx doc!
The symbols of these elements spell out "FUCKBiTcHeSGeTmONeY." Alternate ways to do this include replacing Helium (He) and Sulfur (S) with Hydrogen (H) and Einsteinium (Es), and/or replacing Bismuth (Bi) with Boron (B) and Iodine (I). Some people have been clever enough to use this as their yearbook quotes.
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).