Can be used to descibe any douche bag who thinks too highly of them selves and everyone knows it.
"Dude, do you know that guy over there?"- Bro 1
"Nah, bro. Do you?"- Bro 2
"Yeah, broski. He's a total Manhart." - Bro 1
"Shit bro, never gonna talk to that guy."- Bro 2