Periscoping 

The concealing of an erect penis by folding it behind your waist band, leaving the head of your penis exposed underneath your shirt.

"Woops, I was just about to stretch out my arms but I realized that I was still periscoping."

Periscoping by The Goodtime Boyz January 4, 2012

Peniscope

A male member that needs to cautiously pop up and survey the surrounding environment, before committing to surfacing fully.

As drunk as I was, I had to up peniscope before agreeing to go home with her...

Peniscope by Jennicam January 20, 2009

Periscope Toe 

When your 2nd toe is longer than your big toe. It looks like a periscope.

Ladies, you know that summertime is coming up. Don't walk around with periscope toe and have your 2nd toe keeping lookout for the rest of your toes!

Periscope Toe by Sia Sly March 30, 2010

Periscoping 

When you stand over a kneeling girl, facing the same direction, with your balls draped over her eyes such as would be the "viewfinder" on a periscope. Then she grabs the "handle" of the periscope, and aims you toward the intended target. Bonus points if she makes sonar ping noises.

"Last night I couldn't find Josie's butthole in the dark, so Debbie tried her hand at Periscoping, and steered me right on target. Boom! Sunk that battleship!"

Periscoping by Mourning_Would November 23, 2016

Up Periscope 

1) naval term to raise the optics on a submarine
2) bath or shower game for typically one very lonly man

"raise the periscope and arm the cannon"

Up Periscope by chris unger April 22, 2004

periscope 

Looking around to cheat on an exam so that your head and neck resemble a periscope. Your head swivels back and forth so quickly that even the dumbest teacher will probably catch you. However, there is always the chance that periscoping works, and it's one of the best feelings in the world. It's commonly used by those too lazy to put any effort into cheating discretely.

John: Dude that test was hard
Fred: Hell yeah, luckily I was able to cheat off the smart kid next to me
John: Ya I could see you cheating from across the room. You looked like a periscope!
Fred: Lol well at least Mr. Walters didn't see! He's oblivious!

periscope by 12chainz February 6, 2014

Periscoping 

The act of giving a blowjob to a man standing up while giving handjobs to 2 men facing the guy in the middle.

I peroscoped your 3 best friends last night.

Periscoping is the new felching.

Periscoping by MehMehMehMehMehMehMehMeh May 29, 2011