I neither know how to write in Jeph's voice (because I've never seen him in a situation where he's getting slapped by a sentient bird), or in Yelling Bird's voice (because I am galactically incapable of swearing), so... yeah.
Yelling Bird: BRO-WING.
Jeph: Bro-wing?
Yelling Bird (repeatedly beating Jeph with his wing): IT'S LIKE BRO-FIST, ONLY I CAN'T DO THAT BECAUSE I DON'T HAVE FISTS, YOU MORON.
Jeph: Ok, ok! Bro-wing!
Yelling Bird: THAT'S NOT A WING. COME ON! MAKE A WING! CLUCK LIKE A CHICKEN IF YOU ABSOLUTELY MUST!
Jeph: Ok, geez! I'm making chicken wing arms, see?
*Bro-wing*
Yelling Bird: GOOD ENOUGH FOR NOW, BUT STILL PATHETIC. YOU'D BETTER REMEMBER HOW TO BRO-WING NEXT TIME I FEEL CONGRATULATORY. IT'S NOT A MOOD I EXPERIENCE OFTEN.
Jeph: Gee, I can't wait...