The undercover city is what you call a stain usually made by the sexual reproductive byproduct called sperm is wiped on a mattress when done masturbating. This will most likely be hidden under a sheet cover or pillow.
Jimmy: Ew, what the hell is that on your mattress.
John: Oh that, it's my undercover city.
Jimmy: Why...?
John: I have a problem, huh? :(
Jimmy: Yeah. You do.
John: Oh that, it's my undercover city.
Jimmy: Why...?
John: I have a problem, huh? :(
Jimmy: Yeah. You do.
by Babyfucker69420 August 19, 2021
When two individuals (male and female) have sexual intercourse whilst in the middle of the female delivering the baby.
by Babyfucker69420 December 14, 2019