Combination of bro and soap (bro + soap = broap)
You know bro, that really good smelling soap that us bros use to get fresh after we either a) finish LAX practice, b) beast at the gym, or c) get done railing a slam-piece.
Usually axe or old spice will do. Because after all bro, you gotta smell chill for the bitches...
"Bro, did you just lather in broap, bro?"
"Legit, cuz you smell chill bro...super chill."
"oh okay thanks bro that was chill."
"Np bro...bro, do you think I can get some broap