old hat

out of fashion or obsolete

bell bottom jeans and elevator shoes were considered old hat at one time, but now they're back in style.

by polo June 7, 2005

old hat

Something so well known and established that its practice isn't anything novel or interesting.

Knock knock jokes are rather old hat nowadays.

Picking up girls at clubs is old hat for him.

by tehdang February 14, 2014

old hat

Refered to when something has been brought up, or posted on forum multiple times.

"this is such an old hat, find something original"

by Chris February 14, 2005

old hat

Vulva or vagina, esp. of a lady the senior side of 35. Popular term in the Victorian era.

Be careful dismounting that boneshaker, Delilah, lest the world and his dog see your old hat.

by Jonny Firepants February 27, 2014

old hat

A previously worn condom.

I couldn'y find a new one, so I used the old hat from last night.

by Brett Calvin September 30, 2006

old hat

someone that is a bit emo. could possibly be a lesbian, due to quirkiness. loves panic at the disco. has never read "where the wild things are", and plays bass for rockband.

That girl Maegan, she's old hat! Just look at her!

by kmania November 15, 2009

old hat

An alteration of the term new shoes, meaning to burp.

Fred: (BURP)
Paul: 'old hat!'

by Shaggy April 20, 2005