a covering for the head, esp one with a shaped crown and brim
informal used to specify a particular role of somebody who has more than one
wearing his ministerial hat
first out of the hat
the first name, etc to be selected at random
hat in hand
in a deferential manner; cap in hand
keep something under one's hat
to keep something it a secret
pick out of a hat
to select (e.g. a name) at random
take one's hat off to somebody
to give somebody them due credit
talk through one's hat
informal to voice irrational or erroneous ideas, esp in attempting to appear knowledgeable
throw one's hat into the ring
to offer to take up a challenge
hatless adj
[Old English hæt]