No smelling, no biting

Famous expression in Portugal (translated from "Quem não cheira não trinca"), meaning that without smelling it, you have no right to bite it. This can be used in any situation!
This was created by a Portuguese dude named João Rêgo and it became famous in the north area of Portugal.

Dude 1: I won't smell that
Dude 2: "No smelling, no biting"