Something between a metaphor and an innuendo

The discussion of music came up while talking with a good friend of mine. We were discussing the word choices used by rappers like Lil' Wayne and Eminem. That these word artists can put lyrics together in such a way that the meanings are suggestive of so many things yet may not make sense at all is marvelous to me.
I guess that is the beauty of creative language and art. To hear, or read words that are so simplistic at first and then to apprehend a different meaning from them can feel so good. The words can give explanation for a feeling that was previously indescribable or paint a picture of a past experience more vividly than could ever be conveyed otherwise. My favorite though is when words (lyrics to music specifically) enhance a moment in time. That at THAT specific moment THOSE words echo in my mind and ring through my body.
Anyway, as we were talking we were trying to think of what part of language they use when they are writing their lyrics. We know that they use metaphors, and that they are also used as innuendos. The problem was that we were so sure that there was another way to describe it all. So I looked up some words and their definitions that I thought were explanatory of the way in which they write.

Metaphor:
-a figure of speech in which a term or phrase is applied to something to which it is not literally applicable in order to suggest a resemblance

Innuendo:
-an indirect, or subtle, intimation (verb which means to indicate or make known indirectly; hint; imply; suggest not to be confused with the adjective intimate meaning of an association, knowledge, understanding, etc. arising from close personal connection or familiar experience.) about a person or thing, esp. of a disparaging or a derogatory nature.

Insinuate:
-to instill or infuse subtly or artfully, as into the mind

Allegory:
-indirect representation
-symbolic narrative, figurative treatment of one subject under the guise of another
- to speak so as to imply something other

Figuration:
-the act of representing figuratively

Paralleling:
-having the same direction, course, nature, or tendency; corresponding; similar; analogous

Metonymy:
-A figure of speech in which one word or phrase is substituted for another with which it is closely associated , or of which it is a part, as “the bottle” for “strong drink,” or “count heads(or noses)” for “count people.”
very similar to synecdoche which is a figure of speech in which a part is use for the whole(as hand for sailor),the whole for a part(as the law for police officer), the specific for the general(as cutthroat for assassin),the general for the specific (as thief for pickpocket),or the material for the thing made from it(as steel for sword).

The definition for this word is the broad canopy for many of the other words I looked up.
Trope:
-any literary or rhetorical device, as metaphor, metonymy, synecdoche, and irony, that consists in the use of words in other than their literal sense.