Help with black slang- are these black slang nicknames offensive?

I am working on a multicultural comic book about streetfighting cats and dogs that fight crime and I am researching slang terms to use as nicknames for the cats and dogs in my comic.

I wanted to know if these nicknames for black characters are offensive?:

Cooly
Cuffy?

Urbandictionary gives the definition of Cooly as:

http://www.urbandictionary.com/define.php?term=cooly

cooly 9 up, 33 down
A cooly is a freind, associate, or simply another cool individual.

and Cuffy as:

http://www.urbandictionary.com/define.php?term=cuffy

cuffy 17 up, 8 down
The illest nigga alive
wow i dont understand why that cuffy kid is so abap

I know the word coolie had something to do with blacks in the '70s and is a racial term used for West Indians and Cuffy is a term used for a leader of a slave revolt down there but are people going to think that when they see these terms and get offended?

I was also thinking of Cooley High:



I think Cooley was a racial term for blacks in the '70s.

I am curious- some people were making a big fuss over the word "puffy".

I have some other black slang terms I want to use as nicknames- When I can think of them and come up with them I will post them later.

Please help - thank you.