1. The act of slowly floating upwards in a hot tub while erect or in the vernacular ,sporting a woody.

Origins: First to properly execute an up periscope one must first " blow ballast " by farting in the hot tub.

If undetected by the other occupants, preferably female, the "scope master" will raise his body until the head of his penis slowly breaks the surface. If he remains undetected he will slowly continue to push his penis farther out of the water until detected.

When detected he will yell "Down Scope" and rapidly pull his body downwards while acting as if nothing happened. If he remains undetected that means the female occupants of the hot tub are receptive or totally hammered, in either case, this often results in a "torpedo" attack after he yells UP SCOPE!

2.A mythical command often seen in WWII movies to raise the periscope. Up periscope is not used by modern submariners. The officer of the deck will inform the watch standers submarines control room the he is "Raising Number 1 ( or # 2 ) scope." at which time he will rotate the periscope ring that activates the raising / lowering mechanism.
1. Dave's penis was totaly out of the water when he yelled " Up Periscope!" "Euwwwwwww a dick!" screamed Denise.

2. "Up Periscope!" Ensign Jones commanded. The watch standers looked at each other in quizzical disbelief. Don't you mean "Raising Number 1 scope?" asked the Cheif of the Watch. " "Uh...right Cheif"...Ensign Jones demurred.
by Global Feetus April 3, 2007
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The act of ripping a bongload, then downing a beer bong before exhaling the smoke. A variation on a "submarine"
Dude I'm so wasted, I just busted a Down Periscope with a fatty loader of kush and 3 silver bullets.
by Bart Mancuso February 9, 2010
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The act of poking one’s wiener above the pool surface to keep an eye on the ladies.
Wheelchair Dan wanted to perv on all the women at the Westin pool, so I told him up periscope, then he did the pool periscope and spotted Rhonda with tha honda.
by Skervey McCleary August 13, 2022
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When you are a well endowed man who sits when he pees and finds his junk submerged at the tip when in the washroom.
Andrew woke up in the middle of the night and couldn't stay standing while he peed. The Leb Rusky sat down and a chill ran up his spine, as his junk hit the the water and became a reverse periscope.
by Reverse Periscope May 30, 2014
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pushing your penis downwards to enable penertration into a female laid on her back with legs behind her ears.
down periscoping has to be tried
by paul johns December 15, 2004
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When you stick your penis out of the sunroof of a moving car.
Sometimes when I get bored my friends and I drive around and cock periscope everyone.
by jhix March 15, 2016
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A state of desire and need for the addiction of the social media app called Periscope. Created by therealbookbabe , the term mistressperiscope eludes to the need and secrecy to continue interacting with the app even though it's destroying your life
MISTRESS PERISCOPE will steal your soul if you pay more attention to her than your partner or life responsibilities
by La Reigna👑 November 12, 2019
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