Top Definition
one of the memberz to the Animaniacz. the only one that wore pantz.
wacko: your a retard, yacko. and we sing a song that says our sister is cute when shez angry.
by infusino September 23, 2006
1 more definition
Slang for midget.
<hacker> I could be a basketball star
<hacker2> whatever yacko
by oTt June 17, 2003

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