Undercover's 

Undercover cops, plain clothes police officers

I saw some undercover's on the avenue, so heads up

Undercover's by Sweet Crimson August 19, 2010

Undercover Slut 

An Undercover Slut is a guy or girl who seems quite innocent and maybe even a bit prude but is actually a sexual deviant when given the chance to be. Being that the person is generally quiet and reserved about said deviancy, it's quite surprising when they reveal their true colors and you often find yourself very, VERY intrigued and wanting more. Just remember that they are, in fact, undercover, and have to uphold their mild-mannered alter-ego when exposed to the general public, and you must respect that. Also, don't assume that they've hooked up with tons of people- most Undercover Sluts like to reserve their sluttiness as to keep it meaningful and, obviously, undercover.
It's sort of like when the chick in the movie takes off her glasses and pulls her hair down and straddles you and you get the idea.

Guy 1: "Hey, you know that chick Gracie?"
Guy 2: "The one who always gets like, really good grades? Yeah, what about her?"
Guy 1: "That party last night, dude... You wouldn't be able to tell, but she is a MAJOR Undercover Slut."
Guy 2: "Oh my god, really? Wow... I never would have guessed it.. That's awesome."
Guy 1: "Yeah, but don't tell anyone man."

Undercover Slut by SwaggieG September 8, 2013

Undercover sardar 

A sardar who cleverly conceals his keski a.k.a “dastaar” with a cap, a fashion statement popularized by Indian Cricketer Harbhajan Singh in the late 90s.

Person 1: Does that guy have a patka under his cap?

Person 2: Yeah, he’s an undercover sardar.

Undercover sardar by MassiDaMunda March 30, 2021

undercover supervisor 

A person of the working tier class that reports back or snitches to company supervisors in exchange for immunity to shortcomings they have committed.

Worker 1: “Hey man, you did the clean up last Friday?”
Worker 2: “Yeah dude, I had to do it with Chris because the boss man thought I forgot how to do it.” *Worker 2 raises eyebrows*
*Worker 2 has been doing his job impeccably for 2 years and does it so good he gets chill time to do whatever he wants once done a cleanup.*
Worker 1: *Laughs generously* “Awww, damn white boi, the man on to you!”
Worker 2: *Looks Worker 1 square in the eye with chin up looking humorous*
“UNDERCOVER SUPERVISOR.”

undercover supervisor by A fly on da wall December 23, 2017

Undercover Slut 

A girl who one would not assume gets with a lot of guys (whether because she is weird, nerdy, or just really nice) but in reality has hooked-up with half the school.

Bob: That Mindy girl's pretty cute, she seems really smart though. I wonder if she'd get with you.

Joe: Dude, she's an undercover slut. She gets with everyone!

Undercover Slut by M.C. Skizzlet September 3, 2010

Undercover Sub

n. a long, submarine shaped turd that is crapped out before, during, or immediately after sex....beneath the bed sheet covers.

The undercover sub slinks, slithers, and slides across the sheets until it comes into contact with one's sexual partner...causing a multitude of reactions which may include, but are not limited to: excitement, anger, fear, frustration, confusion, bewilderment, angst, mild and/or severe depression.

Last night after I did it with Janie, I swear I heard her shart. No sooner had I smelled the crap, then an undercover sub appeared out of nowhere...spreading across my leg like a wet, stinky rash. It ruined the new bed sheets!

Undercover Sub by Dr. Josephus May 27, 2011

undercover snowblower 

Like a dutch oven, but different.

Gave dat ho an undercover snowblower

undercover snowblower by TDGSR April 28, 2015