Top definition
Whenever you are doing someone a favour and giving them a ride in your vehicle there are 3 options for payment for this favour:

1. Cash
2. Grass (i.e marijuana)
3. Ass (e.g. sex)
Joe "Hey dude, can I get a lift after hockey?"
Mark "No problem, cash, grass, or ass though - sorry bro, rules of the road"

Mary "Can I get a ride home after work?"
Bill "Sure you can; cash, grass, or ass?"
by F.Castro March 18, 2009
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