Blow the whistle is a phrase that is used to describe when someone reports illegal or unethical behavior. The crossword solutions for this term are TELL (4 letters), TOOT (4 letters), EXPOSE (6 letters), REF (3 letters), RAT (3 letters), and STOPPLAY (8 letters). TELL means to communicate information, usually by speaking, while TOOT is a synonym for blowing a whistle. EXPOSE means to reveal something that was previously hidden, REF is short for referee, RAT is an acronym for 'reveal and TELL, ' and STOPPLAY is a command to stop playing a game.