It originated in 2000 around South Gwinnett in Georgia and it means "Definitely" or "Im excited" or "I can't wait"or "For sure" or "Cool beans" or "Im down" or "Im game" or "I will be there" or "Yes" or as an updated version of saying "You bet" or "You betcha" which means you agree and are looking forward to an upcoming event/plans of some sort.
Dude: Are you coming to the club tomorrow night? They said Usher is performing and there will be hella chicks there"
Dude 2: Fuck yeah bet that up!
Dude 2: Fuck yeah bet that up!
by RCCola11581 August 18, 2023

by yeeet yeetyet September 4, 2019

Jacob was getting in his girlfriend Alisha's head for something stupid she did and her friend Taylor standing by listening, opened her mouth and started side betting in Alisha's defense.
by Thiiis Guy! September 17, 2023

A wager, typically a sporting event, that is placed before one retires for the evening. Commonplace with the 50+ male demographic from the Midwest, the Piss Bet gives the individual the satisfaction of checking on their Westcoast wager, while making their trip to the toilet at 2am.
Johnny K. has had a nice lil Saturday. Just caught a three-legged parlay, now it’s time to sync up on a Piss Bet. Does Hawaii play tonight?
by HerbDove21 March 11, 2024

Person 1: Lads, I've stuck 45p on Aubameyang first goal scorer at 5/1
Person 2: Why have you only done 45p?
Person 1: I'm skint. I got steaming and spent £32 in McDonalds last night
Person 2: That's such a typical muzz bet
Person 2: Why have you only done 45p?
Person 1: I'm skint. I got steaming and spent £32 in McDonalds last night
Person 2: That's such a typical muzz bet
by bigfatcamel January 12, 2022

John: I made a bet with Nick, he still did not give me the money!
Nick: Just give me some time, I didnt know I would lose.
John: Why bet then?
Nick: Just give me some time, I didnt know I would lose.
John: Why bet then?
by Asklinne April 1, 2022

to either affirm something positively or to end a conversation because someone said some shit you don’t like
1-“You tryna go roll up right quick “
1b-“bet that”
2-“we don’t have to see each other we are just friends”
2b-“bet that” *ends facetime*
1b-“bet that”
2-“we don’t have to see each other we are just friends”
2b-“bet that” *ends facetime*
by The real definitions of urband October 10, 2022
