nimnode 

Someone or something that is acting without common sense.

A stupid action.

In class:
*Student walks up to the white board in the middle of class and draws a smiley, then sits down without being seen*
Teacher: "WHAT NIMNODE WOULD EVEN THINK OF A STUPID IDEA LIKE THIS TO DRAW A SMILEY IN THE MIDDLE OF CLASS!!?!?!??!?!?!"

nimnode by hamster101 August 1, 2011

nimnod 

A know-nothing. An ignorant person.

Nobody tells me anything; I'm just a nimnod!

nimnod by Petev May 16, 2006

Nimroderie 

a spirit of idiocy and fellowship. See nimrod

The group's nimroderie became apparent when they began to render the Star Spangled Banner in a loud chorus of belches.

Nimroderie by rawa April 27, 2006

nimnod 

A really cool, super awesome, interesting, arty, hot, sexy pansexual girl.

-"I need to Nimnod up my game if I'm going to rock this party tonight"

-"When I meet hot Nimnods like that I get all sprung".

nimnod by M.Sue October 27, 2009