A fishlike boss from the popular MMORPG "Maple Story".
Pronounced PEE-AN-USS.
Many jokes revolve around the closeness of this word to the word "penis".
"Man, I checked out pianus yesterday and he jizzed me to death with his white, spermy beam."
"Goddamnit you n00b lv 50."
Describes the feeling of toothpaste dropping from your mouth after you have brushed for 2 minutes. Usually some sort of foam that uncontrollably spills out of your mouth.
Man: I hate Pisnea, because I gottoothpaste all over my nice shirt.
Friend: oh sorry dude.