nodding off
phrasal verbUK /ˈnɒdɪŋ ɒf/
US /ˈnɑːdɪŋ ɔːf/
Falling asleep for a little while, often by accident.
He kept nodding off during the long movie.
OTHER MEANINGS
2. Gradually losing focus or attention.
The students were nodding off during the boring lecture.
3. Slowly becoming less active or alert.
The meeting seemed to nod off after lunch.
4. Briefly lowering your head as you fall asleep.
She was nodding off in the armchair by the fire.