sweat bet 

A gamble that makes one uneasy because of the odds on winning.

I placed a sweat bet on the underdogs. I wonder if they will actually win for me.

sweat bet by Ereck Flowers May 4, 2019

You bet your sweet patootie 

It means the same as the phrases, "you bet your ass" and, "you bet your dick and balls".
That is, you're absolutely, positively, 100% certain about the final outcome of a situation.

{Seen on a website about flashlights, LEDs, and lasers}:
I tried to cut through the outer casing to bare metal with the blade of a Swiss army knife, and with some minor difficulty, I was able to do so. This shows the unit has a Type II anodized finish to it (...)
Would I really cut up a brand spanken new $450.00 laser? You bet your sweet patootie I would, if it's in the name of science.

You bet your sweet patootie by Telephony May 30, 2015

back seat betty 

A female who frequently has sex on the first date or first encounter.

Britney: Hey Lohan, did you call that guy we met at the coffee house yesterday?
Lohan: Yes, we met for drinks and well sex this morning.
Britney (laughing): Sometimes you can be such a back seat betty.

Nicole: Paris, did that guy give you a ride home from the club last night?
Paris(smiling): Yes, you could say that he gave me a ride last night.
Nicole: Your family should have been in the automobile business, because you are such a back seat betty.

back seat betty by atisha v January 6, 2008

fat sweaty betty 

extremely ugly and annoying woman that works the bar see also skeezer but not hot

yo terranova fat sweaty betty just grabbed your ass

fat sweaty betty by miller March 21, 2005

sweaty betty 

the fate suffered by females who get a sweaty vagina in anything other than crotchless clothes.

bloke 1; errrrghhhhh, what's that fishy smell?
bloke 2; it's that bird in front i bet she's got a right Sweaty Betty!

sweaty betty by mr pimpernell May 17, 2015

back- seat betty 

Someone who frequently has sex on the first date or first encounter.

Jan's friends refer to her as back- seat betty because of her many one night stands.

back- seat betty by mariy December 6, 2007

Sweaty Betty: 

A Fat Girl or Woman. Like you know to do it with her you'd have to role her in flour and look for the wet spot.
Sweaty Betty

She is one Sweaty Betty. I would date her if she was not such a Sweaty Betty:

Sweaty Betty: by B_Rad_N_Green November 5, 2007