Bet

Bet conveys agreement, affirmation, or confidence in a plan or statement. For example, if someone says, "Let's grab food later," a person may simply reply with "Bet!"

Originating from the 19th century, when gambling terms were popularized, it evolved into a casual way of saying "you can count on it" or "sure thing" (and "you betcha" for those in the Midwest). Over time, it transitioned into mainstream slang, particularly among African American Vernacular English (AAVE) speakers, and became a part of popular culture.

The term gained widespread popularity in 2017 and into the 2020s thanks to its frequent use on social media platforms like Twitter, Instagram, and TikTok. Gen Zers, millennials, and Gen alpha have especially adopted "bet" as a quick way to communicate agreement or approval online, in messages, and in real life.