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pronounced s-bit. Used to describe a cunt while typing without actually saying the word cunt. Also a typo.
Damn you're a cybt.

Do you know Jess?
Yeah, Shes such a cybt.
by hugzinc February 09, 2009
Internet shorthand for "Can you Believe that?".
"Did you see that guy get dunked on. CYBT?"
by JGfan November 21, 2012