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6.
To blow a big lead, a synonym of to choke. Typically used in the context of sports or video games. Often preceded by adjectives such as epic, huge, total, or major and punctuated by a well-timed bro or dude.
Another epic meltdown in Wii Golf from Kevin, bro.

Major meltdown dude. Classic Kevin move.

Gonna need a total meltdown from Kevin this round. He's up 4 strokes in Wii Golf but he has no mental toughness.
by trojanfever45 February 21, 2010
 
1.
1. Describes what happens when a person freaks out, cracks, loses control of themselves. Life - reality at large- becomes overwhelming. They just can't deal with it all. The person may act out, withdraw, become emotional, run, etc...
"I was sick and on this one day I had an exam, an essay due, a news print deadline, multiple other commitments, 3 people hogging my limited time, others screwing with my head plus, life outside of college was spiraling out of control. I became overwhelmed and went into meltdown." --If meltdown happens to you or someone you know, just remember; It's not the nicest thing, but it happens. Step back & regroup. That's all you can do.
by Wezli (meltdown survivor) June 19, 2005
 
2.
(n.) - an act brought about by loss of temper or anger. (v.) - to lose control.
Jimmy had a meltdown over the last piece of pizza.
by BTLS Fan September 21, 2005
 
3.
1. a disaster

2. a loss of one's temper

(from a nuclear power disaster of the same name)
If someone doesn't fix the elctricity in the computer room I might have a meltdown.
by Light Joker June 16, 2007
 
4.
A state of complete brain overload that grinds all self control to a halt.
ZEEK's meltdown:
another puck ass little shit tough guy computer geek
dude your so bad ass over a computer
get a life cause fucking with me in person will end your life quick
Ill tell you just like I tell all the other punk pussies that think there bad
Ill give you my address or you give me yours and Ill be more then happy to come and drag your fag ass all over your house with your mom or dad or wife or whoever crying not to kill your ass,
you puck ass child molesting piece of shit.
by absent April 08, 2006
 
5.
Something which can describes a freak out associated to specific people, places, things, and/or events.
I'm having a jigsaw puzzle meltdown.

I'm having a Martin Luther King Day meltdown.

If you don't leave me alone, you're gonna give me a meltdown.
by stank hole marc January 31, 2011
 
7.
A message board post resulting from a severe pwning
216962. by ProfReality, 6/12/09 12:03 ET

I live vicariously through a shitty panted old jack-a$$ and his retarded son, and the scholarly bald-headed, thick calved, limited athletic ability players that they covet.

Signed HJ Nation

^^meltdown^^
by Dorothy Zbornak June 12, 2009