Bustin slobs means kissing..... making out. Its that simple. The phrase has something to do with slobber, but how it started I don't know.
1) Last night met up with another internet slut, we busted slobs for a while but got no coochie.

2) We were in the back seat, bustin slobs, thowin stem, and a friggin pig came along and broke up the party.
by Ezeerider July 10, 2005
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Making out with another person in a sloppy slobbery way.
He was bustin some slob on a chick, and he didn't even know her name.
by Boome007 July 18, 2009
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