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!
The Urban Dictionary Mug
One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.
Buy the mug