also: しらんふり
noun, noun or participle which takes 'suru', intransitive verb
pretending not to know; feigning ignorance
Used when someone deliberately acts as if they don't know something, often to avoid responsibility or an awkward situation. Commonly used with する.
彼は私の質問に知らんぷりをした。
He pretended not to know about my question.
知ら
Please stop pretending you don't know.