Nimbrain

Another word for idiot or a weirdo or someone that has done something silly.

'Your such an nimbrain sometimes!'

by KC&GD February 21, 2012

Nimbrain

Someone who says/does something or is stupid.

A polite was of saying Retard or Dickhead etc.

Kathryn: I'm so much cooler than you!

George: Oh dear, you really are a nimbrain!

by supercoolguy April 09, 2012

Nimbrain

A polite way of calling someone an Idiot.

Girl: I'm so much cooler than you!

Guy: Oh, you really are a Nimbrain!

by thecoolestguyintheworld April 12, 2012