godan verb (-ru), intransitive verb
become mentally unstable; have a mental health episode
Internet slang derived from メンヘラ (mental health sufferer). Used to describe someone acting erratically or showing signs of mental distress, often in online contexts.
See also: メンヘラ
最近、彼はよくヘラってるみたいで心配だ。
Lately he seems to be mentally unstable a lot, and I'm worried.
あの配信者、またヘラったらしいよ。
I heard that streamer had another mental health episode.