buy us a round, put a drink on the tab
Tu ganhou no jogo, paga uma aí pra galera!
You won the bet — buy the gang a round!
A transparent Northern Brazilian colloquial: paga uma [bebida] aí = 'pay for one [drink] over there.' No idiomatic origin beyond the literal request — typically called out in a bar after a win or a piece of good news.
Falando's Idiom Trainer teaches you to recognize idiom meanings and create sentences using them, so you can speak like a Brazilian.
