Question

Keep Something under Your Hat to keep something secret

Accepted Answer

I'll tell you who won the election, but you've got to keep the results under your hat. This expression comes from the late 1800s, when many more men and women wore hats than they do today. Your head is under your hat. So if someone tells you to keep a bit of news under your hat, he or she is telling you to keep it in your head and not reveal it to anyone else.

Idiom	Keep Something under Your Hat
Example	I'll tell you who won the election, but you've got to keep the results under your hat.
Meaning	to keep something secret
Origin	This expression comes from the late 1800s, when many more men and women wore hats than they do today. Your head is under your hat. So if someone tells you to keep a bit of news under your hat, he or she is telling you to keep it in your head and not reveal it to anyone else.

Hat Head Won Election Results Secret Expression Late