Ichidan verb, Intransitive verb
to become sulky; to become irresponsible (due to disgruntlement)
Usually written using kana alone
秀樹ったら、当時は全っ然こっちに慣れなくてね、しょっちゅうふてくされてたのよ。Hideki, he really hadn't settled in here at all and sulked all the time.
Also written 不貞腐れる【ふてくされる】