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When someones pants are falling down and their ass crack is visable, they are then on or traveling down ass crack lane.
Guy 1: dude you can see that chicks crack!
Guy 2: Shes on a walk down ass crack lane!
by LMFMC FUCKER June 07, 2009
4 2
When you can see someone's butt crack and look directly into it.
DOOD1: Man look over there

DOOD2: Man that is Gross

DOOD3: What happened?

DOOD2: I just went down ass crack lane :|
by MRUnpossible June 07, 2009
8 0