1
general::
Phrase(s): cool someone out
Sl. to calm someone; to appease someone. • Cool yourselves out, you people. We gotta be sensible. • The manager appeared and tried to cool out everybody, but that was a waste of time., Phrase(s): cool out
Go to chill out.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
see COOL OFF, def. 2 and 3. coon's age Also, a dog's age. A very long time, as in I haven't seen Sam in a coon's age, or It's been a dog's age since I went to the ballpark. The first phrase rests on the mistaken idea that raccoons ("coons") live a long time. The variant may reflect a similar assumption but the true origin is not known. [c. 1835] Also see DONKEY'S YEARS.
American Heritage Idioms