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

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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

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Essentially a bicycle which has fallen apart and is no longer rideable, but due to desparation it is used regardless. Original meltdown was manned by Plodman.
To qualify a bike as meltdown-esque, it must have at least 3 of the following:
- Brake cables snapped/no break mechanism
- No ability to shift gears
- A wheel so buckled you could classify it as voluptuous
- A warped and bent frame that is hardly able to support to weight of the rider
- The name of the rider scrawled upon the frame in permanent marker

Random chugger: "Hey Mox, did Plodman ride the meltdown tonight?"
Mox: "He tried, but he lost it's handlebars on a chugquest home last night. Let's get some chicks."
by Loz Cook April 12, 2009

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something that is crazy fun or really tight. Usually said when having a good time.
Girl: Yo David, that party last night was off the chain!
Boy: Yea bitches were on my nutts nigga, fucking melt down!
by Katiia March 09, 2008

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This is when someone farts "badly"
1st stage- Safety (normal)
2nd stage- danger (wet fart)
3rd stage- MELTDOWN (mustard comes outta the ass)
John made a meltdown and people laughed at his yellow pants.
by EViL MARshMeLL0 August 09, 2004

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