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1.
A person of higher seniority than you who has contempt for you and who willfully goes out of his/her way to make your life miserable.
Not only did that neidermeyer not give me the day off for my aunt's funeral, he scheduled me to unload the salmon cart. I got there late and smelling like fish.
by Mark VZ October 17, 2006
 
2.
To exclaim "I am tired of this shit" and then proceed to insert one's finger into the asshole of an unsuspecting female who has passed out from consuming excessive amounts alcohol.

The preferred location to perform a neidermeyer is in a moving vehicle with many spectators.

Guy 1: I got tired of that shit.
Guy 2: So what did you do?
Guy 1: I neidermeyered that hoe!

Girl 1: My asshole feels weird. It is as if someone inserted a small object up it.
Girl 2: You were probably neidermeyered last night.
Girl 1: Damn! Thats the third time this week.
by I enjoy blumpkins December 02, 2007
 
3.
An asshole junior officer. From the character Lieutenant Niedermayer in the Animal House movie.
We fragged that Neidermeyer.
by Bill the Cat May 13, 2008
 
4.
To insert one's finger into the asshole of an unsuspecting female who has passed out from consuming alcohol;

The preferred location to perform a neidermeyer is in a moving vehicle with an ample amount of spectators.
Guy 1: I got tired of that shit.
Guy 2: So what did you do?
Guy 1: I neidermeyered that hoe!

Girl 1: My asshole feels weird. It is as if someone inserted a small object up it.
Girl 2: You were probably neidermeyered last night.
by Soulaja Boy November 08, 2007