A completely unreasonable person who constantly reacts with anger or any other extreme emotion when they do not get their way often over simple things "normal" individuals take in stride, but not insane enough to be placed in a home (due to frequency of occurences) but still causes enough misery and grief for themselves and others around them.
Melissa made us all uncomfortable when she kicked the walls and struck herself repeatedly when she learned a check she wrote bounced at the bank. A simple error drove her into a rage and we all believe she is functionally insane.
by Foxy Funderburke September 21, 2009
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A person whom while able to minimally function in society, hold a job (at varying degrees of success), feed, clothe & house themselves still remain a disaster at nearly all other personal & social aspects of life.

They are your severely disturbed, paranoid and/or inappropriate coworkers, family & friends, yet remain gainfully employed, operate vehicles daily and manage to not starve to death.
Because of their multiple failed relationships and substance abuse charges, Brittney & Lindsey remain the poster children for the functional dysfunctional.
by fuzzygreysocks January 26, 2010
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1.) a person who, although intelligent, functions as a dumbass. 2.) Someone who is motivated to rise only to the level of function necessary to complete a task.
1.) Q: "Your friend seems smart! Does she do well in school?" A: "Nah! She's a functional dumbass!"
2.) That functional dumbass fixed my computer problem, but now all my files are deleted!
by 3 card Monty May 25, 2009
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fuhngk-shuh-nl ri-tahrd

1. Psychology. a person of the operational order in a former classification of mental retardation, having a mental age of less than three years old and an intelligence quotient under 25 yet still mantains the ability to convince society of their relevance, and ability to be trusted to act intelligently.

2. A charismatic individual which demonstrates inconsistent reasoning abilities and has an inherent disreguard towards their sociological perspective.

3. One who assumes "any publicity is good publicity."
Dixie: Can you believe that idiot?!? Does he have any idea how offensivly stupid he is?!?

Dewey: I can believe it because he is a Functional Retard.
by Mr. Nova<3 March 18, 2011
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It's requiered for all java projects. If you do not know the pingu function, you should not be programming!
import *.pingu.quack

Phyrehawk: My damned program won't work!
Pyro: Use the pingu function Jace.
Phyrehawk: WTF?!!
by Pyro_teamkill March 3, 2005
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A functioning homosexual is a gay person who has not given
thier life over to the drama associated with their sexual orientation.
A homosexual who can pass as straight when the need arises.
Someone like Will on Will and Grace.
Gay Dude 1: It's amazing how calm Bob was when Brucie had
his meltdown at the GLT meeting last night.
Gay Dude 2: Bob is very good at keeping it together, he is quite
the functioning homosexual.
by jsd9632 December 17, 2011
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