1 definition by BCracecar

Top Definition
When semen is allowed to dry and harden inside the ass after anal intercourse, gluing the orifice shut and forming a seal.

Stands for "Jizz in the Butt" Weld
I had sex with this girl the other day. But she was being a total bitch, so I JB welded her ass shut.
by BCracecar December 15, 2012

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