look up any word, like cunt:

1 definition by reinprecht

 
1.
It was first commonly used while cruising around the "Beach" (a specific area) of Toronto in the summer of 2007. "Koopa" is correctly used when you drive pass an ugly person in your car and yell the word "koopa".
"Oh shit man roll down the window"...(window is rolled down)... "KOOPA! KOOPA! KOOPA!"
by reinprecht November 07, 2007