"It's Always Sunny in Philadelphia" star Charlie Day has ACTUALLY taken a sip of rum ham ... and even though his crew made the drink famous, he says it's vile.
If you haven't seen the show -- first of all, shame on you -- rum ham surfaced in Season 7 when Frank (Danny DeVito) concocted the rum-soaked delicacy.
Day was retrieving his bags at LAX on Saturday when he told us he was once at dinner ... and someone sent a rum ham drink to his table -- but you gotta hear Charlie tell the story himself.
Still beats sunscreen tequila.
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