nod off

US /nɑːd ɑːf/
UK /nɑːd ɑːf/
"nod off" picture
1.

quedarse dormido, cabecear

to fall asleep, especially unintentionally

:
He kept nodding off during the boring lecture.
Se quedaba dormido durante la aburrida conferencia.
I was so tired, I almost nodded off at my desk.
Estaba tan cansado que casi me quedo dormido en mi escritorio.