摸鱼 Words — Dong Chinese Dictionary

mōyú

to catch fish

浑水摸鱼 húnshuǐmōyú to fish in troubled water

To take advantage of a crisis or chaotic situation for personal gain
混水摸鱼 húnshuǐmōyú to fish in troubled water

to take advantage of a crisis or chaotic situation for personal gain
瞎子摸鱼 xiāzimōyú to act blindly

Literally meaning "a blind person feeling for fish"; used as a metaphor for doing something without a clear method, goal, or plan.