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."
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A 'pianus' is a piano with penuses as keys, with the white keys being white penuses and the black keys being black penuses.
Pianus teacher: "Okay Lindsay, are you ready to learn how to play the pianus?"
Lindsay: "No! The pianus makes my fingers sticky!!!"
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A man with a most unfortunate name (google him).
"Hey dude, this guy has the wort name ever *snicker*"
"Uhhhhh."
"his name is 'Harry Pianus'"
"Wtf! Is that a joke?"
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