tbonmk Share definition Flag Tbonmk is a famous moroccan bad word used to insult someone. Also it can be used to describe the reproductive system in mothers. A: What's wrong with Tbonmk , can't you see?! B: sorry it's my fault, but don't insult my mom. tbonmk by Saad Grey Gilbert September 4, 2021 Get the tbonmk mug.