Top Definition
Harrison's favorite expression when he's surprised or pissed. Or both. It depends on his mood.
Brian:hey Harrison i just got laid...

Harrison GOD DAYUM!

by harrison ambrosio August 28, 2008
Interesting and amusing way to say 'Goddamn,' brought about by some random flash video and utilized constantly by Hirosuke.
And, occasionally myself.
by Leiko October 03, 2004
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