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1.
The act of one standing around, with no purpose, what-so-ever. While having intercourse between their butt-hole and their thumb.
(Man standing around with his thumb up his ass)

Cop: HEY YOU STOP LOITERING!!!

Man: Screw you! (RUNS)
by EvanANDJared June 13, 2011
 
2.
What you are doing if you are sitting in a parking lot, usually at a 7-11 waiting for a girl that you havent seen forever to pass by.
We were loitering at 7-11 for no good reason
by Steven April 14, 2005
 
3.
What punks, creeps, Ace Boon Coons, and Pachuco boys can be found doing outside pool halls, liquor stores, and 7-Eleven stores. Loitering involves standing somewhat still, posing like a tough guy, spitting on the sidewalk, and (if you're an Ace Boon Coon) occasionally shouting "Sheee-IT!" or "MO FO!"

Proprietors of businesses post signs that say "NO LOITERING." These signs can be found at better pool halls, liquor stores, and 7-Elevens in all major cities. They do this because if anything is bad for business, it's a slime ball punk or nose-picking creep or a greasy haired Pachuco or a shit-ass Blood or fat slob Crip standing outside your establishment.
Hector collects lucrative entitlements from the liberals because one of his ancestors was a conquistador. With no work to go to, he spends his afternoons loitering outside Mack's Liquor Store.
by Cap'n Bullmoose September 27, 2007