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When doing someone from behind you throw some dirt on them and then give them antlers with your hands. Then make a low pitched groan like a moose call.
Guy 1: I heard that Fred got the dirty moose from Kevin the other day.
Guy 2: Wow, Queers.
by Austinnn August 05, 2007
The act of having sexual anal intercourse with a female doggystyle, then after giving a hidden friend in a closet a pre-determined signal , putting your hands up on your heads like moose antlers as he pops out and snaps a photo
Dude i totally gave that bitch The Dirty Moose and tom got it on film! Want to see the picture?
by Gujmach August 03, 2009