long in the tooth

old, advanced in age(from the practice of judging a horse's age by the length of it's teeth)

The plumbing is a bit long in the tooth. It needs to be replaced.

by The Return of Light Joker January 22, 2010

long in the tooth

(adj.) Old, outdated. no longer to perform its primary function at optimum level.

The playstation one is a bit long in the tooth these days.

by Kung-Fu Jesus June 7, 2004

long in the tooth

A women who has passed her prime

"Hey John, is your new secratary hot?"

"No, she is a little long in the tooth."

by John McDonough November 18, 2003