A phrase said when something is sure to happen. A guarantee.
Example 1
Don: You going to the ice cream social tonight?
Craig: You bet your dick and balls I am!

Example 2
Craig: Are you trading that Carlton Fisk baseball card?
Don: You bet your dick and balls I am!
by fartmaster69 October 31, 2011
mugGet the You bet your dick and ballsmug.

you can bet your biffy

Bob: "Hey Joe, wasn't that just the greatest movie that we just saw?" Joe: "You can bet your biffy that it was, Bob!"
by terra esoteric December 24, 2009
mugGet the you can bet your biffymug.
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.
by Telephony May 30, 2015
mugGet the You bet your sweet patootiemug.

i bet my left nut on it!

a bet you feel you cant lose. a guaranteed win of a bet thus there's no way i'd be able to pay you with my bollock
the sun will come up in the morning i bet my left nut on it!!!
by sir curly February 5, 2007
mugGet the i bet my left nut on it!mug.

Bet dat up!

"Bet dat up!" Sometimes pronounced "Bet that up!" Is the war cry of the a Southern Baptist choir member
by OrangePelting July 4, 2018
mugGet the Bet dat up!mug.
A retort against someone who takes a fun conversation way too seriously, to the point their very presence is a buzzkill.
Normal guy: I expected nothing and I still feel let down, lol. Couldn't have been any worse, right?!

Buzzkill: That you were let down means you had some expectations. It's impossible otherwise.

Normal guy: I bet you're fun at parties.
by R487 June 27, 2022
mugGet the I bet you're fun at partiesmug.
Being so sure of an outcome that one would be willing to place his testicles on a barn door track and smashed if he was wrong. To be very certain of a bet.
I’ll bet my balls to the barn door that the sun will rise tomorrow morning.
by Gak gak attack December 21, 2021
mugGet the bet my balls to the barn doormug.

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