From Longman Dictionary of Contemporary Englishtake/bring somebody down a peg (or two)take/bring somebody down a peg (or two)UNIMPORTANTto make someone realize that they are not as important or skilled as they think they are Evans is an arrogant bully who needs taking down a peg or two. → peg
Examples from the Corpus
take/bring somebody down a peg (or two)• No harm in taking Evans down a peg. 