Puss

A person, typically a male, who is easily influenced by pain, people, fear, and anything requiring mind over matter. They often act like they are tough (one who is not easily influenced) when they are not.

"Hey, look at that guy over there walking around with his chest puffed out, you know he's probably a big puss. I almost feel bad for him."

Hammer Head

Someone with reduced intellectual capacity but no mental handicap.

"Hey Jack, look at the fucking hammer head over there trying to park his truck in a compact car parking spot. Dumb ass!"