Over Achiever 

1: A person who is motivated by their ideals. An intra-competitive person often marked by abandoning that which hinders their ideals.
2: One who strives for various degrees of near perfection.
3: Someone that desires more than is needed.

The over-achiever would not get married until she found the perfect father for her future babies. She died alone in her early fifties.

Over Achiever by Nco November 17, 2003

Over Achiever 

A person whose accomplishments seem to exceed their abilities.

In the early 70's, Microsoft was staffed by a motely group of over achievers.

Over Achiever by Kyle Roebuck December 17, 2003

Over Achiever 

A person who is in a relationship with someone who is much better looking than they are.

I am amazed that guy landed a girl like that. He is a total over achiever.

Over Achiever by BMush December 22, 2008

Over Achiever 

A person who tries to hard for the sake of trying hard.

That Faggot over achiever Alex is back at it again.

Over Achiever by HAHA OVER ACHIEVER May 12, 2019

Over Achiever 

A person who tries to hard, breaks their bones and somehow ligaments and also eye somehow, and also makes good grades. Also is now a cripple.

That fag over achiever, Alex, is back at it again with a broken leg.

Over Achiever by HAHA OVER ACHIEVER May 12, 2019

over-achiever 

see: overachiever

The over-achiever clicked on overachiever even though both spellings are used.

over-achiever by Nco November 20, 2003

Over-Under Achiever 

Someone who achieves the extra unecessary achievements, but does them in a half-ass fashion.

Patrick decided to be an Over-Under Achiever when he went the extra mile to do his extra credit, even though he already had a 103 percent in his english class. This project was done in a very UNorderly fashion. The rough draft write-up ended up having its title 'rough draft' erased and then replaced with 'Final Project'.

Over-Under Achiever by E-bag March 29, 2010