打歼灭战

Traditional (Taiwan): 打殲滅戰

dǎjiānmièzhàn ㄉㄚˇ ㄐㄧㄢ ㄇㄧㄝˋ ㄓㄢˋ

    • to concentrate all one's strength on one big push to finish a task

Character by character

Saying俗语俗語

Idiom惯用语 · Widely known

Literally
fight a battle of annihilation
Meaning
To concentrate all your strength on one big push to finish a task. Approving or humorous.

Sources