"I'm not a fool" is the simple phrase. "Ain't" is still considered slang, even though the word has existed for a couple of centuries so far. "No fool" is "not any fool" or "no kind of fool". Don't worry about the double-negative here. Poor grammar has never stopped anyone from writing pop music. ;) PS. I read it as "I ain't no fool". Using "it" doesn't make sense, you need to use "she/he", or even "there ain't no fool" (there is not any fool...)

I agree with Peachey.

Hi Jalan ain't: is the contraction of (am not / is not / are not /have not / has not ) i ain' t no fool = i am not a fool .. wish it helps you

It's RAP, right. Forget it now, it's incomprehensible & not English. (& not cool) Same question posted on http://forum.wordreference.com/showthread.php?t=1154590 I suspect it originally may have come from "it ain't no fool job" ... That is that a fool could not do this job. But I'm guessing. If any of this is correct it would come out something like; It is no easy job to .... It is no fool's job to be this cool. It is not easy to be this cool. It is either "I ain't no fool" = I am not a fool. Poor modern slang ignoring the double negative. Or, "It ain't no fool" as posted, & then my answer si the only one that addresses the question. This is RAP. I'd guess it is really "It ain't no fool". Ok, no-one agrees with me. Do some searches guys. It could be meant to be "I ain't no fool" in which case you are right, but if it is really as posted "It ain't no fool", then go with my explanation. Jalan, hope one of these answers is correct & helpful.