The act of ripping a bongload, then downing a beer bong before exhaling the smoke. A variation on a "submarine"

A tatoo, found on the penis with the words 'Welcome Aboard'. From the movie Down Periscope.

A manner of applying the Arabian Goggles. You sneak up behind the person and lower your balls onto their eyes, while saying "Down Periscope!"

pushing your penis downwards to enable penertration into a female laid on her back with legs behind her ears.

Erection recession.

Used when two or more males are in tight living conditions. One is changing and yells down periscope when removing underwear to warn the other(s)that boxers, briefs, or other type of underwear is being removed.

The act of going down on a woman only to ineptly go eye to ass. Generally associated with intoxication and accompanied by a case vicious pink eye the following morning.