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Weed master Tommy Chong has smoked out his fair share of celebs, so when we asked him who is the ONE famous person he's dying to get high with ... it's no surprise he named the one Beatle he hasn't smoked with.

Chong was out walking his dog Saturday in L.A. and took the time to discuss a slew of topics with our photog: getting high with his cat ... the potency of edibles (they are very, very potent). You get the idea.

But more importantly ... he told us his dream smoke-buddy is the only Beatle he's never shared a dewbie with. But more importantly ... he told us his dream smoke-buddy is the only Beatle he's never shared a dewbie with.

But before you watch the clip, try and guess which one in our poll.