bumsauce 

The slightly moist feeling between one's buttocks, specially around the anus generally felt on a hot day, after a day of heavy bum burping or after exercise. Bumsauce is not mearly sweat but actual secretion from the bum and is normally quite smelly. Also called sebum.
Note: this is NOT the same as the squits.

My goodness Mavis, you've got quite a beefy arse this evening. Best you wipe off the bumsauce with your knickers before I go down on you.

bumsauce by Steven D November 20, 2006

bumsauce 

faecal matter in one of its more fluid states, such as diarrhoea

her sheets were covered in bumsauce

bumsauce by Love February 9, 2005

bumsauce 

The chocolate goop in the back of your pirate treasure that shines in the daylight.

“Arrrrrgh, me bumsauce is dripping away like a fish”.

bumsauce by DoctoralFlemington February 6, 2021

bumsauce major 

Means major bummer. Something you say when an unfortunate or untimely event occurs.

"Dude, I can't go to the bro sesh today."
"Oh, bumsauce major, man."

bumsauce major by ldawg2damax September 15, 2011

Bum Sauce 

The liquid that is held between the cheeks of your ass that smells like a mixture of sweat and shit.

Person 1: Dude, I was sitting down all day, and I've accumulated some Bum Sauce
Person 2: EEEWW!! THAT'S GROSS! AIN'T NOBODY WANNA HEAR ABOUT YOUR BUM SAUCE!!

Bum Sauce by Jeffery Deadstein May 12, 2020

Bum Sauce 

A total bummer. Something super lame.

Oh damn little laxer hitting mad pipe. Total bum sauce man.

Bum Sauce by superkoolaid17 April 24, 2010

Bamsauce 

Another term for Awesome, Legit, Spectacular.

Guess what!!!? i Won 10,000 dollars "Bamsauce"
Dude that guitar solo was "Bamsauce"

Im so excited "Bamsauce"

Bamsauce by Sonofabarb March 17, 2010