O.P.D.
Other People’s Drinks is when you’re out and you’re running out of beer tokens. If you’re sneaky, you can steal someone else’s drink and get a free night.
@bob: 'I’m gonna drink all your beer!' (he took 5 drinks)
Lisa: 'Why are you drinking my beer?' (he didn’t know it was hers)
Tom: 'I’m gonna drink your beer!' (he drank 3 drinks and fell over)