A very harsh case of diarrhea where one will sit on a toilet for an extended period of time while what feels like flames shoot out of one's rectum, esp. after eating exceptionally spicy food.
Dude 1: Where's Steve, I haven't seen him since yesterday.
Dude 2: He's probably sitting on the john with a case of The Screamin' Meanies.
To "Eat the Meaties" is an affectionate form of vernacular around eating your ladies tender parts (meat curtains) after she's had an exceptionally long absence of such a release. It is rarely met with scorn or disdain as it represent a perfect opportunity for both a sexual act and simultaneous release of pent up frustration. A synonym for cunnilingus and a playful pun on the cereal tagline "Eat your Wheaties." It's clever and women know precisely what it means.