The sacred oath that takes place between two bros in which each man takes the phallus of the other and proceeds to slay
the dragon.
If the oath is broken, the phallus of the oath breaker shall be
violently removed.
Ex 1: *While playing hearts*
Gareth:"Bro
I promise I don't have the
queen of spades, you can play that king."
Pierre: "I do not believe you"
Gareth: "I will BroShake on it"
Ex 2: Marwan and Michael secured their promise to not look each other
in the eyes during their 3-way with a BroShake.