There was something really cool, though, I noticed about it. In S3E10, “Flaming Moes”, Homer makes lean. And then Moe sells lean.
Except he doesn’t. He makes an alcoholic beverage out of Non-Narkotik childrens cough syrup. Only in the basest schoolyard definition (LOLSIZZURP) would that qualify as “lean.” Generally when adults or rappers (who are hardly adults) refer to lean they are talking about Prometh with Codeine or a Codeine derivative like Tussionex. And I don’t think Krusty could get away with pushing that to kids OTC.
Sorry this is a pet peeve of mine. There are a lot of dumb kids out there who think drinking Robotussin until they puke will make them Lil Wayne. (Really they shouldn’t be messing with any of this shit but whatever.)