take a chill pill

take a chill pill

To calm down; to stop being angry, anxious, fearful, etc. Usually used as an imperative. Take a chill pill, will you? Panicking about being late won't make me drive any faster. I sent the student to the principal's office after she told me to take a chill pill.
See also: chill, pill, take
Farlex Dictionary of Idioms.

take a chill pill

tv. to calm down; to relax. (see also chill (out).) The police officer told Jim to take a chill pill and answer the questions.
See also: chill, pill, take
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions

take a chill pill

To calm down; relax.
See also: chill, pill, take
American Heritage® Dictionary of the English Language, Fifth Edition.
See also:
  • chill out
  • come in
  • come in a certain position
  • come on in
  • cool it
  • Cool it!
  • cool it, to
  • come off it
  • Come off it!
  • break it up