Slang term. Stands for "Spontaneous Erection" and is used to casually let a friend know that you can't stand up due to certain circumstances. This definition was first used in Mukilteo, Washington in a high school calculus class and was invented while doing physics homework at the Lee household.
"Eddie, Edward, wait... Sper..."
"Oh... hurry up."
ayon kay JimChach ika-27 ng Marso, 2004

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