noun, noun or participle which takes 'suru', transitive verb
finish eating; eat everything on one's plate
Used when someone completely finishes a meal or a specific dish, often implying appreciation or a challenge.
給食を完食した。
I ate all of my school lunch.
大盛りラーメンを完食するのは大変だ。
Finishing a large bowl of ramen is tough.
食べ切る is a more general verb meaning 'to eat completely' or 'to finish eating,' while 完食 is a noun/suru-verb often used in contexts like challenges or clean-plate campaigns.
Compound of 完 (kan, 'complete') and 食 (shoku, 'eat').