The Bet 

The Bet is to not have sex.

The way to win 'The Bet' is by not having sex.
The way to lose 'The Bet' is by having sex with someone.

If you lose 'The Bet' then you must owe your best friend the equivalent of £20.

Mark: "Hey Tom how was your date last night?" Tom: "It was amazing! I lost the bet last night." Mark: "Awesome, were's my £20?" Tom: "Shit..."

The Bet by ThatDyslexicGuy May 19, 2010

The ‘bet 

Used to describe what someone has when they sleep with a lot of people without being clean. The alphabet of STDs grouped together.

Bro jake is always fucking random hoes with no condom.
Yeah he’s probably got the ‘bet.

I heard that Amy has, HIV, HPV, HAV, and another STD.
Damn she’s really got the ‘bet.

The ‘bet by HellaSadman March 3, 2021

hedging the bet

When a person has both a boy/girlfriend and another friend they flirt constantly with. That way, if the boy/girlfriend relationship doesn't work out, there's another person in reserve to ensure against singledom.

After Hilary and Matt's relationship turned rocky, Matt began hedging the bet and hanging out more with Beth.

hedging the bet by Maddie Corbeck August 13, 2006

Lose the Bet 

Slang term for jacking off. Comes from the bet featured on Seinfeld.

"Hey man did you lose the bet last night after your girlfriend left?"
"Yeah dude, we're stuck on second so I had to do it by myself."

Lose the Bet by Prettyflyforawiteguy January 12, 2010

I lost the bet 

It actually means, i found a girl, but I'm ashamed to admit it.

i saw you with this girl yesterday, him yeah i lost the bet

I lost the bet by oliver0008 October 6, 2020

never bet the devil your head 

1)poe story of uncommon wit
2)common sensical, seemingly unnecessary advice that george bush (and by extension his many victims) might have benefited from had it ever been recommended to him.

george bush; he tried to kill my daddy, let's git us some evil doers dead or alive!
any one with a brain; never bet the devil your head, george.

never bet the devil your head by lexicali slim September 20, 2009

Bet The Farm 

To put up everything you have, while gambling in a card game.

Mike bluffed with his ace high and bet the farm losing everything.

Bet The Farm by TwitChy December 14, 2003