What is Periscope?
1.
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
It's damn creepy how Ben periscopes for Martina every night after their breakup.
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2.
The act of agressively fisting a female (or a male) into the vagina or anus hole, then rotating your arm inside the victim left and right, like a periscope, then yanking your arm out.
Damn, i had this trick in my room last night, and after my roomies and i gangbanged her asshole, i gave her twat the ol' Periscope! She was fisheyed by morning time!
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