fill up

fill in

To inform somebody, especially to supply someone missing or missed information.

fill in the blank

A placeholder allowing for any of a variety of possible answers or a single elicited answer.

fill one's boots

To perform at a high level in one's official role.

fill one's face

To eat, especially in a hearty or greedy manner.

fill one's hand

To draw one's handgun, especially for an armed confrontation.

fill someone's shoes

To do (somebody's) job; to perform or assume (somebody's) role.

get one's fill

to be satisfied, to have enough of something.