Born in a Barn

Originally used to say "you left the door open", based on the fact that barn doors were left open by farmers to let animals in or out.

More recently, it has been used to simply indicate that a person is ignorant or uneducated as if they were brought up on a farm.

"it's really cold outside and you left the door open! were you born in a barn?"

by savageroyalty February 17, 2010