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1.
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

Words related to GOD DAYUM!

brian damn dayum goddamn harrison
 
2.
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