It's what you are tasting when you felch someone.
Alternative spelling is 'spum'.
I love the taste of spum when i'm felching.
sbum...is a word used to name the new manga/comic-style at south america
hey...did you read the new sbum magazine about crislie??
This means Sweaty bum, also known as swass or swamp ass.
Brando: I have horrible sbum rn
Me: Haha ty is fucking ur ex