A Dave Matthews
A Dave Matthews is when you drink someone else's pee and act like it's a fine wine. The guy who started this nonsense is a total weirdo who drinks pee on stage like it's a normal thing to do.
I drank my friend's pee at a concert and it tasted like regret.
He poured a cup of his own pee and called it 'the liquid of the gods.'
At the show, someone threw a cup of pee on stage and Dave drank it like it was a gift.