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1.
having low hanging pants, often baggy
He was slabbing so bad, his pants were hanging off his dick.
by Bhatany March 28, 2008
 
2.
The art of repeatably 'slabbing' ones nut sack and/or strap on device against the preferred orifice(s)* during a sexual encounter.

*where orifice is defined as any surface, whether socially acceptable or not.
Bloke 1 (to mate on the subject of porn): Slabbing hell, did you see the slab on that!

Bloke 2 (in response): I'd slab that!
by Codway April 25, 2014