Anyone whom excessively enjoy's sucking mens' reproductive organs. Usually used to refer to trans-sexuals but occasionally homosexual men as well. Also see cocksucker, cum-guzzler.
The derevation of this word comes from the similarity between trying to eat a slice of pizza all in one bite and the act of giving felacio.
"I'm pretty sure that homo in our english class is one hell of a slice-fool"
"Haha yea, he just can't get enough of it. I hear 'the slice fool' is even his nickname!"
Person: "Hey, can you help me with my math? You seem like you know what you're doing".
Fool: "Oh no, sorry, I'm just a fool in a trench coat". I know nothing".
or
Person: "How is that person so smart? They know everything??!!!"
Grump: "Please! They're just a fool in a trench coat. They have no idea what they're doing".
Referenced from the Chappelle Show when Wayne Brady was the guest. It is what you say before you want to whoop someones ass/take their money/commence some form of violence or robbery. Sometimes mistaken for 'brace yourself'...which is wrong.
(Whilst watching Chapelle Show)
Wayne Brady: There he is....BREAK YO SELF FOOL!
Man: AWW SHIT, IT'S WAYNE BRADY, SON!
*Wayne Brady shoots the guy down*
Rhyz: haha that's funny, BRACE YO SELF FOOL
Helena:.........you just killed it........just...no.....