chill pill

[ chil pil ]

noun

1. something that has a calming or relaxing effect.

chill pill

noun

1. informal.
   an imaginary medicinal pill with a calming, relaxing effect

   take a chill pill

Word History and Origins

Origin of chill pill¹

First recorded in 1980–85

Idioms and Phrases

Idioms

1. take a chill pill, (often used imperatively) to calm down; relax:

   Stop shouting! Take a chill pill!

Example Sentences

Perhaps the investigators themselves might be advised to take the same chill pill until a more suitable topic presents itself.

From The Daily Beast