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the traces of blood left on the toilet roll after taking a J. Crump. Usually indcative of piles.
that turd felt like it came out sideways- there was bum jam all over the bog roll
by Herman Dogg December 18, 2003
There are multiple meanings:
1. A party in your pants
2. A sticky pooh which leaves residue
3. A type of dance, which is performed by drunks who believe themselves to be in luck with the opposite sex
I had to wipe my ring well after my bumjam.

by GrannyCatherine November 16, 2006
the act of ramming ones danky dank in a womans limey butt-hole. also known as anal rampage.
Bumjam a lamb
by poo to stink dinkeo July 29, 2003