Down Periscope 

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

"Wanna see my down periscope?"

Down Periscope by Eddy Ortega December 29, 2008

Periscope 

When you get a boner in the bathtub, and it looks like the periscope of a submarine

I walked in the bathroom and he totally had a periscope!

Periscope by captain long dong December 8, 2011

periscoping 

The act of whipping the dicc out while fully erect and placing it carefully between the gut and the elastic of your underwear/assorted leg covering. This aids in either concealing the tiny/enormous size of the male anatomy. Males usually partake in this action while either being embarassed by their size or if they for example are asked to come to the front of the classroom for a presentation "at the wrong time".

Ah shit son mah dicc is soo rock hard right now and Mrs. Cocklesuck just called me up to the front of the class to present for show-and-tell. I guess Ill just tuck it like a periscope...also known as periscoping.

periscoping by BIG BLACK DICC July 22, 2007

Periscope 

When an allen wrench is inserted into an orifice (anus or vagina) and gingerly twisted around, by which the insert-ee can feel sensations that they normally don't feel with an ordinary probe.

My dildo feels great, but that periscope touched me in ways that I've never felt before.

Periscope by Fitchio October 8, 2011

periscope 

A bit of stem that is poking through a rolled blunt.

That blunt had a huge periscope out the side, but it still smoked just fine.

periscope by Aqib Talib October 6, 2010

periscope depth 

When your penis persistently peeks through your underwear fly, regardless of how many times he is readjusted, thus increasing the risk of tip zipper rash.

Hold on a second I need to adjust my drawers. My junk keeps playing a shadowy game of penile Groundhogs Day, you know,... I've been cruising at periscope depth all day...

periscope depth by willisdwaynetwayne December 26, 2009

periscope depth 

n. 1. when you are in a body of water (tub, hot tub, pool, etc) and you are floating at a depth such that just the tip of your penis breaches the surface of the water

{to one's friends in a hot tub}
"i'm at periscope depth"

periscope depth by J.Dizzie May 30, 2012