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2.
To look dirty at someone (up and down)
Oooh dat nigga was just sizing you. You gonna let dat go?
by alypd September 12, 2006
 
1.
1. To treat someone with disrespect.
2. To take advantage of someone.
Why you sizing, I gave you $10 and all you bought me was 1 cheeseburger?!?!
by FreeTrial4DeatH June 06, 2007