Smtb is an abbreviation for the commen phrase Suck my titty bitch. Frequently used as an insult or threat, it can be used to demand one's partner to suck thy's titty.
Michael you're such a dildo, SMTB!
by BITE ME STANK HOE!! May 27, 2009
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Wow, i heard she wouldn't let you explain that you just wanted to tell her something funny, and got all pissed, sounds like she had a S.M.T.B. moment eh?
by asbreakianotototo January 02, 2012
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