polish off
Intermediate (B1)informal
To eat all of something or finish a job quickly until nothing is left.
"The kids polished off the entire birthday cake before the adults even sat down."
Hear it in context

A Dark Fantasy Audiobook: Reborn With A Divine System And Hidden Power (Book 1-4) | Complete Series
NoirCast · 711:47
I asked suspiciously after having seen Ajax polish off

stocks
Gary Savage · 9:00
and really polish off what is already a pretty good year

Who are the Monster Snakes? (Full Episode) | Monster Snakes | Nat Geo Animals
Nat Geo Animals · 27:52
to polish off a gator nearly half its size, but can it really digest the meal...