Used as a replacement word.
Cuz', Fro-Man,Tough Dude, or Cool Guy --
"Imma knock you the 'beast' out!"
"Mayne, shut the 'beast' up!"
"What the 'beast'?"
"Oh 'beast' no"
Aw that was such a beast grilled cheese sandwich. Can I have another?
An ex-lover and/or girlfriend, wife, or other relationship in which the female no longer plays a positive role in your life.
Guy 1: Hey, guess who I saw the other day.
Guy 2: Who?
Guy 1: The Beast.
Guy 2: Really? I haven't seen my beast in a while.
OR
Boy do I feel sorry for the guy who's beast I had sex with last night! She's a keeper!