Top definition
Anyone that is acting like a retard. It can also mean "let us celebrate," if said in a loud happy way.
George: Look at that halahishna!
Billy: Yeah! He has no idea how wrong that corn dog looks in his mouth.

Peter: I'm so pumped for this party! HALAHISHNA!!!
by TheAmazingSchna_Of_Jonathan December 02, 2010
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The vengeful act of crapping on a lover's chest while they sleep.

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