A day of great magnitude of broing out, or chillin' with your bros on the first thursday right after Thanksgiving. This holiday usually lasts the whole thursday and includes each bro consuming tons and tons of food while broing out with his closest bros doing typical bro things. Also no girls allowed.
Bro 1: "You know what next thursday is brochacho?"
Bro 2: "Wait it can't be."
Bro 1: "Yeah man it's brosgiving!!"
Bro 2: "Awh bronameth I can't wait to bro out with you."
Bro 1: "I know broski. This is going to be way better than lasts year's. I'm bringing my three bros from college."
Bro 2: "That's cool, what about Todd?"
Bro 1: "No.......Todd is a bitch. He brought his girl with him last year."
Bro 2: "Ohhhh yeah. And he fucked your mom."
Bro 1: "WHAT?!?!?!?"