"Eata" is a derogatory term for obese people who are into lolita fashion or cosplay. The word is used as an alternative to the phrase "Ita" which in the lolita and cosplay community is used as a derogatory term for wanna-be lolitas, while the term "Eata" applies to any obese cosplayer or lolita regardless of their outfit.
A phrase uttered in such rage that telling another human being to suck a dick would not convey the full intent of the speaker. Generally used sarcastically in return to blatant sarcasm, resulting in a perpetual cycle of bag-eating.
Commonly abbreviated as "eat a bag" or simply "a bag."
When someone has an attitude or is hella worked up and needs to calm the f**k down. A reference to the Snickers commercials when someone "is not themself" until they eat a Snickers.