Bite (sb's) tongue (Short video)

The phrase of the day is: "Bite (sb's) tongue"

• To stop yourself from speaking, even though you really want to say something. (something that might be offensive or hurtful)
  [ --- I know you want to yell at him, but you'll just have to bite your tongue. --- ]
  
• You can say it to someone who has just stated an unpleasant supposition that unfortunately maybe true.
  [ --- When he said he was the best on the team, I just bit my tongue. --- ]