Definition
To begin to lose emotional control or mental stability.
開始發瘋
He's been under so much stress at work lately, I think he's starting to lose it.
他最近工作壓力太大了，我覺得他開始要崩潰了。
She hasn't slept for days and looks like she is losing it.
她已經好幾天沒睡了，看起來像是要崩潰了。
Ever since he lost his job, he's been very down; I think he is losing it.
自從他失業後，他就一直很低落；我覺得他快要崩潰了。