I dont want to get started on this P-dope thing but i will:
Yes, in MOST cases P-dope is slang for dope that is high in purity.
BUT, whether or not it was not misused, it HAS been applied to a PCP-Heroin combo that ive have used personally numerous times (ive seen it in dust/brown dope, as well as oil/tar heroin, and used it in both forms intravenously). Most of the people i bought this combo from referred to it as either "P-dope", "Peace dope" and "Puffy Tar", or "dusted dope", and even strange names like "space tar".
It has also been used to describe synthetic heroin, even if again the word was misapplied, as P-dope mainly refers to potent heroin. But often times, some of the REALLY potent heroin, is actually some synthetic, like a piperidine such as alpha-methylfentanyl, so p-dope may easily refer to some synthetics, as they tend to be quite potent. Usually only regular heroin users can tell the difference from heroin and some piperidine analogue, mainly because the piperidine rush is so strong (though the duration is far shorter), they may very well think its just some potent heroin. I did however make the inference that the "P" could possibly refer to piperidine, but on second thought, i dont think most common drug users are familiar with the term piperidine (i may be wrong), but so again, i was just speculating. It is definitely very plausible that very potent "dope" may be a piperdine synthetic, and thus be called "p-dope", since synthetic dope is in fact potent stuff, even if its not diacetylmorphine or 6-MAM.
Again, we are dealing with SLANG here, so you cant really misapply it, but then i suppose technically you can. So the definition I agree with most is that p-dope is simply "potent heroin", and this is the most common use for it.
But I do KNOW that it can/has been used to described dusted dope (pcp+heroin), and synthetic "heroin" (aka some piperidine analogue, usually AMF).
And even though i am a moderator, i am really just like you guys in most cases (i am not like "ronald", epharmacy and those pricks), in that i am not infallible and i do make mistakes, so just because i say something doesn't mean its necessarily true, but i do not intentionally lie, and all my first hand experience is true. But i do make speculations, and i dont mind being proven wrong. Again, i am just one of you guys for the most part, i just have a moderator title and the ability to close/warn etc. But i try to answer questions to the best of my ability, and as a moderator, you can be sure that i would not intentionally lie or misrepresent information. I do my best with what i have to work with here...