godan verb (-ru), intransitive verb
work without sleep or rest
Internet slang coined after Yukio Edano's intense work schedule during the 2011 earthquake; implies pushing oneself to the point of exhaustion.
昨日も徹夜で枝ってたよ。
I was working without sleep again last night.
あのプロジェクト中、みんな枝ってたね
Everyone was working nonstop during that project.