The practice of keeping your phone off or in flight mode most of the day to save battery and only turning it on briefly every now and then to check your messages, missed calls, fantasy football points, the football scores etc.

Like a WW2 submarine; coming up periodically to check their position and take on fresh air before going deep to avoid detection.
Jim: "Does Clive know we're headed to the Anchor, I can't hold of him? "
Greg: "He's periscoping so best just message him on Whatsapp to meet us there"
by Banksy1441 December 21, 2017
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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.
by BIG BLACK DICC June 23, 2007
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When taking a dump your turd goes down the toilet and still manages to break the surface of the water, resembling a periscope from a submarine.
I just took a dump that was so long it was periscoping.
by stephen sanders November 22, 2006
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The act of hiding your boner between your underwear and your belly so that it faces up 180 degrees, maintaining stealth. The head of the penis sticks out of the pants but is masked by the underwear, jeans, shorts, and/or shirt emulating a periscope. Using the periscope allows you to do everyday activities, while walking around with a massive errection. (for best results use with belt)
I felt nervous to solve the math equation in front of the class, but then I just used the periscope.

I hope parents don't get the wrong idea when I am at the daycare with my raging hard-on, thank God my step-dad taught me the periscope.
by John Paul VII August 27, 2012
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When the tip of a recently erect penis peeks over the waistband of underwear, shorts or swim trunks.
I was at the beach and saw Jeanie and got a boner that turned into a periscope. Luckily, no one saw.
by brokenresearch July 11, 2013
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When the end of an exceptionally long turd sticks straight up out of the water.

Similar to a "breach" (where the turd will arch up out of the water) but fully vertical.

Both of which, really really stink.
Dude, I just totally dropped a periscope in there.
by h.karl February 20, 2010
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Periscoping is an advanced, but non-sexual form of spooning. Unlike being the big spoon or the inverse, little spoon/backpack/jetpack, both partners share equal responsibility. To periscope, one partner lines their dominant eye with the second partner's butthole, and 'peers through the scope.' At the same time, the second partner 'shades their eyes from the sun,' and shouts, "Land ho!"
She was really chill. We hooked up, spooned a bit, and then we tried periscoping it out. Anyway, that's how I got pink eye.
by Perry Scope November 4, 2020
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