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15.
noun.

a person who
1. lives in their own fantasy world;
2. believes their own lives;
3.thinks they have friends that will help them kick your ass when you say something logical;
4. does not understand common sense, integrity, dignity or self respect;
5. causes unnecessary problems for attention;
6. pretends to make plans to hang out to show they are the 'good one' when in actuality is a shady bitch
7. cannot control their emotions
person 1: Wow, that Frances girl is such a psycho!
person 2: Frances started shit with me, and I have never even met her! Who is she?
person 3: Frances is a girl? sounds like a guy's name, what a fag
by frances only friend March 21, 2008
 
16.
Psycho-adj- a term used when a person, male or female, comits an act which is considered weird, strange, disgusting, or gay in any way.
Must be said in a low tone with estranged accent and emphasis on the PSY portion of the word.
Example of pronounciation: PSY-co!!!
S.Stanley is found throwing away a perfectly good doghnut as well as deluctable goodness from the restaurant of his dreams. :)

Matthew (behind scott's back to Carson) "Psycho!!!" Carson "ya i never wanna see that again"
by MAOTOTOTOTOTOTOTOTOTOTOTOTO June 13, 2007
 
17.
An over-the-top psycho.
Andy's cousin Kim is a p-sy-cho.

Beth started screaming at me like a p-sy-cho.
by Psycho Beth November 30, 2011
 
18.
someone whom you ask to leave a tent and then they begin to change into the hulk.
People in the tent: "Shannon please leave our tent"
Shannon *becoming psycho* : "you pathetic parasites!"
by threeways July 04, 2011
 
19.
A crazy ass, supercilious fool, who will stab you with a rusty knife if she sees you holding Ricky Young's hand. REGARDLESS of the fact that they've been broken up for 6 months and she gave someone else head moments before.
SOME BITCH- "Courtney, that was really lame that you screamed at that girl for holding Ricky's hand... You guys have been broken up for 6 months, and you just have Kevin head... Plus, you made a huge scene, and embarrassed all your friends..."

COURTNEY LATTA- "LYKE, OMG, I CAN'T HELP IT?!!! I'M LYKE, JUST SUCH A PSYCHO, OMFGGG!"

SOME OTHER BITCH- "Yeahhh you fuckin are hahahaha"
by imUGLY12345 January 22, 2009
 
20.
1.another word to substitute intense or intensely because you say it so damn much

2.really.

3.someone who is not mentally stable and usually in most cases kills for a living.
your so psycho loosen up dude.

wow that boob job is psycho bad!

did you hear about that psycho on the news who killed all those people and hid them under his house?
by chaachit April 17, 2009
 
21.
Character in the Movie "Stripes". Francis "touch me and I'll kill you" Soyer.
"My name is Francis Soyer, but everbody calls me psycho. Anyone calls me Francis, and I'll kill you. And I don't like nobody touchin' me or my stuff. If I catch any of you...homos...touching me or my stuff....I'll kill you.
by Kebreac April 02, 2008