LMBFTB 

Meaning lick my balls from the back

Yeah bro you can LMBFTB

LMBFTB by BlackyBootyWarrior November 6, 2020

lmbfbo 

Laughing (laughed) (laugh) my big fat butt off.

The comedian was so funny all I could do was lmbfbo.

lmbfbo by Girleegirl November 5, 2013