sneaky fuckery 

It is when you have sneaky sex.

Hey babe let’s hide upstairs and have sneaky Fuckery with the door open and kids downstairs.

sneaky fuckery by Good girl 78 June 23, 2020

sneaky fucker 

An individual who poses as a homosexual merely to befriend unsuspecting members of the opposite sex with whom s/he wants to have sex.

Person A: "That guy is so gay!"

Person B: "Nah, it's just a facade. He's a sneaky fucker."

sneaky fucker by Hypno Toad July 25, 2008

Sneaky Fucker 

Waits for people to have sex, runs out the closet, sticks it in, and then runs away yelling "VICTORY!"

Beware of sneaky fuckers, the motel has had quite a few

Sneaky Fucker by ac788 February 8, 2021