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You're bored but you keep eating. Maybe you're eating because you're bored. But that leads to gluttony. Especially if you're bored all the time, because that means you're eating all the time.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
Japan made a huge change from the postwar food shortage to a period of gluttony.