fill up

US /fɪl ˈʌp/
UK /fɪl ˈʌp/
"fill up" picture
1.

to make something completely full

:
Can you fill up the water bottle before we leave?
The gas tank needs to be filled up.
2.

to eat until one is no longer hungry

:
I need a big meal to really fill up.
The buffet allowed us to fill up on all our favorite dishes.