When you are carrying around any sort of illegal substance or object and you have no access to a vehicle. If you are walking somewhere and a search by the police will get you a ticket or land you in jail, you are "walking dirty"
I was bringing some weed over to my buddy's house and I got caught walking dirty by the police. Now they're sending me to federal bang-you-in-the-ass prison.
by K-Tempz September 27, 2006

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