玩猫儿腻

Traditional (Taiwan): 玩貓兒膩

wánmāornì ㄨㄢˊ ㄇㄠㄦ ㄋㄧˋ

    • to use small sly tricks

Saying俗语俗語

Idiom惯用语 · Rarely used now

Literally
play cat tricks
Meaning
To use small sly tricks. Mildly critical, and often regional (northern).

Sources