An oxymoron,refers to someone who trys acting tough, but is really as soft as a pussy.
This guy I know named Rap acts really tough around his other friends, but when he is by himself he is a pussy, therefore he is a tough pussy.
A person, usually male, capable of winning a fight against an opponent who is a pussy but is unable to win a fight against someone who is tough. That person is the lowest level of fighter but the highest level of pussy.
"Oh he can fight pussies but he can't fight tough people like you or me. He's a tough pussy" - VH