expression, na-adjective
pretending to know; acting like one knows
Describes a person's attitude of acting knowledgeable or having an answer, often when they actually do not. Commonly used in the adverbial form 知った風に.
彼は何でも知った風に話す。
He talks as if he knows everything.
知った風な口をきくな。
Don't talk like you know it all.