Top Definition
one who is annoying and picks his balls infront of everyone. also thinks his own sister is hot!
stop being an isaacliu you bumbaclut. i don't need to hear the stories about you and your sister
by stevens July 10, 2004
1 more definition
A person who backs up into a dumpster.
Oh man, my insurance went up because I was an isaacliu and backed up into a dumpster.
by John September 01, 2004

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