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.

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

by Love February 9, 2005

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."

by ldawg2damax September 15, 2011

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”.

by DoctoralFlemington February 6, 2021