kokkuri
The slow head-bobbing motion of someone falling asleep sitting up. The head drops and jerks back up repeatedly.
💡Falling asleep during a boring lecture — 'I was kokkuri nodding off in class.'
授業中にこっくりこっくりと居眠りしてしまった。
I kept nodding off kokkuri during class.
The old man was ___ nodding off on the park bench.
おじいさんがベンチで○○と居眠りしていた。