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1.
An exclamation when you see something that is really good or really exciting or surprising...
I was walking down the street and this chick passed with a booty like j-lo and I said gat damn.....
by mandengho May 04, 2007
 
2.
An exclamation of frustration or exasperation without the blasphemy of 'goddamn'.
My fantasy quarterback broke his hand and is out for the rest of the season??? ...GATDAMN!

I just ran out of whiskey and the liquor store is closed? GATDAMN!!
by ShotgunWillie August 23, 2012
 
3.
An exclamation when you see something that is really good or really exciting or surprising...
I was walking down the street and this chick passed with a booty like j-lo and I said gat damn.....
by mandengho May 04, 2007