An excessively hairy penis, like that of a bull or moose.

During a sex act in the doggystyle
position, use ones hands to give oneself moose horns by first making a fist with thumb and pinky fingers fully extended and placing thumbs on opposite sides of ones head and angling for maximum pinky extension.
Extra credit for mouthing a big moose call and/or not laughing.
Extra, extra credit for negotiating this maneuver in front of a mirror without partner noticing.

A moose that helps Rocky in his awesome adventures.

Woman with large beast,big booty, very sexy face. When seen men put up their hands like a moose. (Bullwinkle)

When a guy is having sex with a girl doggy style, and he signals to a friend lying hidden in the room that he's having sex. The bullwinkle is done by raising his hands to his ears so to form antlers and shouts HEY ROCKY!!!

The Banner Elk Suprise is preformed when a man is having sex with a woman doggy style and then places his thumbs together with the nails facing each other. Then the man places the thumbs in the womans anus while spreading the remaining fingers apart to resemble the antlers of an elk.

The USAF codename for Barak Obama when he is on Air Force One.

A real BULLWINKLE is when 2 guys each stick their penis in a girls EAR.