ugly, but you may have had sex with them
Person 1: Ho brah that chick is beat.
Person 2: Nah brah, she's kinda undercover sexy...
by e_web January 13, 2012
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When one takes a dump onto a bed prior to engaging in sexual intercourse with one's partner on top of the soil without the partner knowing.
Henry: Dude, I'm about to get laid but I really need a shit. What shall I do?
Harry: Just be her Undercover Swedish Brother!
by yes!yes!yes! March 8, 2014
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A brunette whose facial or body hair is red revealing their ginger roots.
"Did you see Michael Fassbender since he grew a beard?"

"Yep - I had no idea he was an undercover ginger"
by Keemer June 9, 2012
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A straight man who goes out and/or secretly has sex with men behind their girlfriends/wives back
My lax bro Kevis such an undercover brother, he stops by gay bars every night to hook up with dudes behind his girlfriend s back.
by lil leroy October 24, 2022
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Obviously, states like Florida and West Virginia are crazy and weird states. But, an undercover crazy example is Wisconsin. Think about it.
Wisconsin is an undercover crazy state because of Gein, Dahmer, and the Packers.
by Purplenado March 5, 2023
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