Undercover FB User

One who refuses to get their own FB account and instead uses their spouse of significant other's account. This allows them to truthfully deny having an account. This person uses the account to check up on family members and friends.

Sister: "Dad was on mom's FB account again! He grounded me because I cursed on FB."
Brother: "Yeah, he's such an Undercover FB User."

by Lolita75 January 12, 2010

Undercover slut

A girl/boy who appears very innocent but is a huge slut on booze/ behind closed doors

Lucy is such an undercover slut, who knew she's fucked every lad in the village

by Potatosmugler69 August 15, 2015

Underscore

The place between your ballsack and your buttle

Damn nice underscore dude

by Heniceaf??? September 22, 2017

undercarraige

the area between your sack and arsehole thats is usually an unwholly mess if wearing dirty swimming shorts, net chaffing usually is the main cause of a destructed undercarraige.

show us that talcum powder til i cure the mess in my undercarraige.

my undercarraige is killing me, show us that talcum powder.

i need some talcum powder, my ronnie blunderbarrage is in bits and pieces.

by Conor Gannon August 23, 2007

Undercover Brother

A nerdy man who has a timid demeanor and undeveloped physique, (especially a white or Asian man), but an enormous penis.

"Lola said Ling and Bradley are straight-up Undercover Brothers!"

by Mortimer L. Bard August 16, 2007

Undercover Elephant

Otherwise ordinary looking fellow, who possesses a trouser snake of Ron Jeremy-like proportions.

"What's with the guy you were with last night, he seemed so dull?"
"On the outside, sure, but he's a real undercover elephant"

by BobTrollop May 27, 2007

Undercover Slurry

Someone who looks and acts completely innocent but when near alcohol:
Gets incredibly drunk
Dances innapropriately aka : skanking
Hooks up with randoms

Crissy: jeez ur such a undercover slurry
Jay: i cant remember last night
Crissy: its always the quiet ones.

by ScarletPartyxx October 17, 2008