The maximum capacity of bareback-anal-sex cum in the rectum before rupture. Note: 'BSL' not to be confused with 'Bachelor of Science in Law'
"quick! hand me a sandwich bag! i've reached my Bum Spurting Limit (BSL) "
by Hakjab January 30, 2008
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An acronym for the phrase, “B.utt S.ucking L.ips
“Girl, I don’t know what you see in that Eric guy..”

“Shit, you kidding right? He got some major BSL I want all over this booty”
by better2ragewit May 1, 2018
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