Is a text acronym for, "Suck
My Dick Biatch." Usually used after someone texts you
SMH or when someone irks, irritates, or just plain pisses you off.
Cute Girl: You're such a lazy stinky Mexican.
SMH.
Manny: SMDB! Get back in the kitchen!
or
Mom: Take out the trash and clean the dishes. NOW! You stupid lazy beaner.
Manny:SMDB! I'm playing video games hoe!