arm

A hot date to an event, usually school formal/prom to impress everyone else at the event. Usually someone you don't know very well but are extremely attractive.

'I don't really like her, just took her for the arm so everyone would be mirin'

Overbag

Overbag is a term used when a dealer puts more in the baggie then you paid for.

"that guy you hooked me up with overbagged me so much! i paid for a 25 but got more like a 50!"