Bet is a meaning and origin of the Slang Dictionary. What does Bet mean in texting?

African American Vernacular English has a lot of "bet" in it.

Thanks to the influence of Black culture and Hip Hop music, it became more and more popular among college campuses in the 1990's.

The term was first defined on Urban Dictionary in 2003 or 2004, and since then a lot of other interpretations and entries have been uploaded to the online lexicon.