look up any word, like half chub:
 
2.
1. To operate in a secret or clandestine fashion.

2. Pertaining to anything with secret or clandestine overtones.
The undercover police made a drug bust last night.
by 1Spectre4U October 31, 2003
 
1.
A chick that acts innocent but behind closed doors will bang anything.
Damn, look at the chick with the glasses. I bet she is a big time undercover ho!
by Jdogg9696 October 29, 2003
 
3.
Undercover cops, plain clothes police officers
I saw some undercover's on the avenue, so heads up
by Sweet Crimson August 19, 2010
 
4.
Dressing or wearing urban clothes while mixing it up with Hot Topic accessories, standing out from the rest, dressed in urban clothing while listening to hardcore/metal, punk rock, alt. rock, etc...
"He/she is an undercover they like to listen to rock music" "Riff has an undercover ass hardcore band" "I saw some undercover people at the Heaven Shall Burn show"
by The Day You Saw Me Die March 01, 2010