I'm not sure what language these young lads speak, but if I could understand it, I'd imagine that the translation would be something like this:
Bro 1: Hey bro. Wanna do some shots?
Bro 2: Bro! Dude yeah!
Bro 1: I bet I could do 4 shots in a row!
Bro 2: Bro! I could double that! I bet I could do 10 in a row!
Bro 1: No way bro!
Bro 2: Totally! Let me just take off my shirt and prove it bro!
The following video shows the outcome. Poor Bro 2.