signing on AIM, checking if your stalking target(s) is there, and signing off if she's not, giving the appearance of a periscope breaking the surface and submerging again
by BMDubbs January 11, 2008

by captain long dong December 8, 2011

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.
by Fitchio October 8, 2011

by Aqib Talib October 6, 2010

The concealing of an erect penis by folding it behind your waist band, leaving the head of your penis exposed underneath your shirt.
by The Goodtime Boyz January 4, 2012

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!"
by Mourning_Would November 23, 2016

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!
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!
by 12chainz February 6, 2014
