derived from the phrase "halves (1/2's) on a bag" which is used to describe the action of more than one individual purchasing a parcel of pharmaceuticals, usually evenly distributing money for said purchase.

in other words, goin half on a dub.
"hey home slice, wanna go ham on a bacon tonight? I've got 10 bucks."

other similar phrases might include:
"ham on a bagel"
"ham on a biscuit"
by LEDGEandDAIRY February 4, 2010
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