lose one's cool

see under keep one's cool.

RELATED CONTENT

Loose vs. Lose Did you lose that sock in the dryer ... or loose it?

What’s The #’s Real Name?A hash has referred to stripes on military jackets since as early as 1910. But, in the 1980s, people started using hash to refer to the # symbol.

Nearby words

lose heart, lose it, lose no time, lose one's bearings, lose one's buttons, lose one's cool, lose one's grip, lose one's head, lose one's hear to, lose one's lunch, lose one's marbles

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.