noun
plural hats
[count] :a covering for the head that often has a brim and a rounded or flat top
at the drop of a hat
hang your hat
The place where you hang your hat is the place where you live or stay.
hat in hand
hats off to
informal - used to give praise or credit to someone
I'll eat my hat
keep (something) under your hat
to keep (something) secret :to not tell anyone about (something)
pass the hat
to collect money usually for a particular purpose
take your hat off to
informal :to give (someone) praise or credit
talk through your hat
throw/toss your hat in/into the ring
to announce that you are going to try to win a contest (such as an election)
tip your hat
wear many hats
to have many jobs or roles