go down on
US /ɡoʊ daʊn ɑn/
UK /ɡoʊ daʊn ɑn/

1.
hacer sexo oral
to perform oral sex on someone
:
•
He asked her to go down on him.
Él le pidió que le hiciera sexo oral.
•
They decided to go down on each other.
Decidieron hacerse sexo oral el uno al otro.