The responses I'm getting here are very weird.
Maybe if I wrote "I been had done it" instead of "I've"?
Perhaps I have fathomed what youre trying to ask, Hygro. But if it is true that I have, I think the difficulty we have had in answering your question is that you are asking about 1) an idiom you have heard people using that none of the rest of us have actually ever heard (and so can only speculate about), and 2) (I think) an idiom that actually conflates two separate grammatical improprieties. The grammatically correct way to describe oneself eating in the present is I eat (or, present progressive, I am eating); in the past I ate; in the present perfect simple I have eaten; in the past perfect simple, I had eaten. In your OP, you seem interested in the present perfect simple, and in the snippet of chat that L provided, you seem interested in the present progressive. So I will focus on those two tenses. There is an idiomatic alternative (that I associate with demotic African-American English) for the present progressive I am eating: namely, I be eating. There is a different idiomatic alternative (that I most strongly associate with poor whites, actually), for the present perfect simple I have eaten: namely, I done ate.
Both of them involve using a different helping verb from the one conventionally used to express the particular tense: be for am, do for have. But the second one also uses the form of the
verb from a different tense, past for present perfect.
It seems that you are reporting having heard people compound these two grammatical improprieties into something like I been done ate. Is that correct? Have you heard people speaking like that? Using both the be
and the form of the root verb associated with a different tense (e.g. the one used for the past perfect rather than for the present perfect)?
And you feel as though theres a distinction in meaning between the two?
Could you give some actual examples of phrases youve heard people say? That might help a lot.
Or let me ask you this. How important to your question is the past tenses (since I think theyre what is complicating this to the point of gibberish)? In the chat snippet, you are focused on the present progressive: I am running vs I be running. Do you hear the distinction in meaning that in which you are interested in that tense alone (as the chat seems to suggest)? Because, if so, that could help you make your question to us sharper.