Diorrhea with large chunks in it. Its a bit thicker than water; same consistancy as a slush puppy, may be blue or red or both.
'That curry gave me terrible bum slush!'
by Miles Lloyd May 3, 2007
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The art of convincing bums, children or the elderly to move towards the curb/puddle/slush where they are summarily drenched by your passing car.
Steve: Hey Bob, do you want to go Bum Slushing tonight? The weatherman is calling for snowpocalypse!

Bob: How does that work again?

Steve: First we hit the bank and get a few rolls of pennies, then we make a pass down State and Madison throwing pennies all over the place, circle around....

Bob: Steve, you are going to hell.
by customfish February 9, 2010
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