Idioms and Phrases with play the fool
play the fool
Act in a silly or stupid way, as in Helen deliberately played the fool so they wouldn't realize she understood their strategy. [First half of 1500s]
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.