a common typo for the name "brandon". although it refers to a specific person, the term "brandong" may be used to describe any conceited fat son of a bitch that pretends they're good at everything when in actuality, they suck.
person 1: SHUT THE FUCK UP OR I'LL SHOOT YOU WITH MY PAINTBALL GUN.
person 2: (to person 3) ..wow, he's being such a brandong.
person 3: indeed.
"That brandong can suck my dick cause i can beat him with my eyes closed."