Definition 1: When a man slides his penis up and down his partners ass crack during intercourse.

Definition 2: when dudes are just hanging out being dudes. (Use with caution)
1: my girl let me cut her slab last night. It was great!

2: hey, Chance, you want to cut the slab later and play some madden?
by Bputt23 December 17, 2016
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