Shootin the moose 

The ultimate phrase that can be used to make any conversation sound dirtier than it really is.

Tom: So i went out to the club last night and got some tail
Linda: Yeah right, you were probably home shootin the moose.

Jim: So Bill, i saw you leave with Cindy last night.
Bill: Yeah, we went to my place and shot the moose.

Haley: Lady Gaga is so grody!
Jason: No! Everytime I see her i shoot the moose!

Shootin the moose by The Wizard of Faz August 5, 2009

Shooting the Moose 

The act of having sex in general, inspired by the movie Brokeback Mountain, where as one of the main characters fires upon a moose before engaging in hot cowboy mansex.

We were caught Shooting the Moose at the family reunion, that sure didn't go over well with grandma...

Shooting the Moose by Cousin Spiffy August 7, 2006