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1.
A two cupped object, that is quite known. It's a juggling game that you can impress people and score girls with. :)
Boy plays diabolo*
Girl1: OMG hes so hot!
Girl2: I wanna date him!
Girl1: He's MINE!
Boy: Thats the way you do it! *shines teeth*
by Ninjaboy14 October 17, 2006
 
2.
A giant yo-yo usually about 5 inches across that can leave the string. Some beleave it is what happened when a drunk yo-yo and a horny pair of devil sticks got together. Many people who have never done it before think it's simple or will tell you to do things that are imposible.
I diaboloed for little kids once and accedentally killed him.

Hey, toss the diabolo up and to 2 back flips and catch it with your teeth.
by DJ Ethos October 22, 2006
 
3.
someone who likes to lame, flames because he is sexually frustrated and sux in games like tfc.
RastaDiabolos
by Anonymous April 08, 2003