A hat worn when you are having a
bad hair day. This can be any type of hat, as long as it covers up
your bad hair. Badhairhats are
frequently worn the day after a party, due to the fact that a hangover is the major cause of terrible hair.
"Why is Tom wearing that awful hat?"
"Oh, that's just his badhairhat."
"Are
you going to the festival tonight?"
"No I can't. I have a
business meeting tomorrow and
I don't want to show up with a badhairhat."