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1.
Abbreviation for "Up The Butt Club", a slang term for a homosexual.
"Jim was feeling fine until he found out Hank was a member of the UTBC."
de ChelseaT 11 février 2008
 
2.
Utbc = Used to be called.
I utbc Carl, but now I'm known as Carlos.
de bcsw 21 mars 2009