A figment of your imagination.

Similar to dreams, but explains something terrible.
Oh no, I had a nightmare that I would fail my math test!
by Nightmare March 1, 2005
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The hardest mode in the Pump It Up video game series. Both pads are used, for a total of 10 arrows. Unlike doubles play in Dance Dance Revolution or In The Groove, many tournaments exist for Nightmare mode songs. In the World Pump Festival, contestants in the Speed section are required to play on Nightmare mode.

Also known as NM.
Player 1: Did you see that PIU player finish Love Is A Danger Zone 2 Nightmare with an A? I swear he was moonwalking!
Player 2: Holy shit! Someone actually passed LIADZ2?!?
by Jason Nudelman November 20, 2006
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from soulcaliber 1,2&3, before he was nightmare,he was know as the holy knight sigefriend but before sigefriend could destroy the unholy sword the sword told him to pick it up and use it to track down the one who killed his father,so he did and nightmare takes over when ever siegefriend is sleepin
boy:omg Nightmare is so Fuking kick ass on soulcaliber 1,2&3!
by Spike L April 4, 2008
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A scary thought, or something that gives you the shivers.
I had a nightmare that a bear tried to eat me
Spooky
by The amaze lover March 5, 2017
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The black jaunce that unexpectedly releases itself from the pants of TRICK. The nightmare is a sight unforgettable to the memory. Be careful when receiving exposure to the nightmare. Warning: Might permanently damage the eyesight, but its a classic.
"Oops, I dropped my towel"
"Ah trick, put the nightmare back"
by The one and only March 4, 2005
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A demonic shadow that will possess a certain human and will
Give them godlike powers over the darkness.
Will only attack if it is pissed off at people who make fun of it's host.
by Lizard51 October 23, 2012
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A 25 year old, fat, still lives with his mother, pokemon lover, who thinks "gangbanging" is when two people e-kiss. He likes to call random girls whores because any self respecting woman wouldn't give him the time of day, and has the a tough time holding an intellectual conversation. Also a complusive liar.
Nightmare: I won powerfest 1994, causing a HUGE upset.
Marrshu: And where's the article?
Nightmare:....no one reported it.
by JennihasaLife November 20, 2006
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