The accumulation of residue, in one's ass-crack, that appears after long periods of bodily neglect (read: poor hygeine). The residue is composed of various elements; the most common are: poop, ass pubes, accumulated sweat resin (aka: salt cream), hemroidal or vaginal medication residue, blood, lubricant, and fuzz from undergarments.
I went camping last week and didn't shower for 4 days. I had to scoop the Bumslaw from my crack with fpoon!
by Bumslaw August 25, 2009

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Top Definition
Residue, left on a toilet seat, usually in the shape of a "Y" (reflecting the reoccurring placement of an unwashed ass-crack, from one, or multiple persons), that collects over time, due to an insufficient cleaning/maintenance routine of the toilet in question; most commonly seen in gas station stalls. The composition of Bumslaw may vary; the most common elements include: poop, ass pubes, accumulated sweat resin (aka: salt cream), hemroidal or vaginal medication residue, blood, lubricant, and fuzz from undergarments.
That bathroom hasn't been cleaned in months. The bumslaw on the seat is half and inch thick!
by Bumslaw August 25, 2009

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1. 73h pwn463 (MEDIC_)

2. The sexual act of putting Cole slaw in one's bum then eating it. This act can be preformed by both genders, which is also like "69", and "bukkake"(boo-cocky) which also can be preformed by both sexes
1. dud3, I g07z fuck1n6 pwn3d by d1s dud3 n4m3d Bumslaw wh1l3 pl4y1n6 c0ck4d00dy 4 0n PS3.

2. After we're done with our KFC picnic we can do a bumslaw with the left overs, if you want?
by Son of a August 26, 2008

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