look up any word, like hipster:
 
1.
Coming from Spanish translating literally to "one more." Common when drinking or during drinking games.

Popularized by the movie shanghai noon when the two main characters get drunk and convince each other to go another round asking "Uno mas?"
Drunk 1: I should stop now...
Drunk 2: Come on! Uno Mas?
by $$$Danny$$$ October 06, 2008