1.
falling asleep unintentionally; dozing off while doing something
the act of falling asleep without meaning to, often while using a phone, watching TV, or chatting online
スマホを見ながら寝落ちした。
I fell asleep while looking at my phone.
電話中に寝落ちしてしまった。
I accidentally fell asleep while on the phone.
昨夜は映画を見ていたら寝落ちして、最後まで見られなかった。
Last night I fell asleep while watching a movie and couldn't finish it.
FORMATION:
寝 (sleep) + 落ちる (to fall) → to fall into sleep
VERB FORM:
寝落ちする (to fall asleep unintentionally)
MODERN USAGE:
This term became popular with the rise of smartphones and online communication. It's commonly used when:
- Falling asleep while texting or on social media
- Dozing off during an online video call
- Falling asleep while gaming
COMMON CONTEXTS:
- LINEで話していて寝落ちした (fell asleep while chatting on LINE)
- 通話中に寝落ち (falling asleep during a call)
- ゲーム中に寝落ち (falling asleep while gaming)
RELATED WORDS:
- うたた寝 (dozing off lightly)
- 居眠り (nodding off while sitting)
- 仮眠 (intentional nap)