If Aaron Paul wants us to believe he didn't care if everyone knew his name when he walked into the Cheers bar in Boston ... he's full of Schlitz.
Aaron and a pal popped into the famous drinking hole Wednesday to grab a couple of beers ... but everyone was so impressed they probably would have broken out the meth stash if he wanted.
Aaron -- looking a lot like Jesse Pinkman -- took pics with fans and the staff ... whose troubles are all the same.
And we're told he left a nice tip too, bitches.
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