月夜の晩ばかりじゃない（つきよのばんばかりじゃない）

Japanese vocabulary

Meaning: you better watch your step!; sleep with one eye open!

See it used in real works

• Example sentences from Japanese novels & web fiction (Massif)
• Hear “月夜の晩ばかりじゃない” pronounced in real videos (YouGlish)