8
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 February 28, 2005
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9
the most well known r6 nerd, disgrace to online gaming communities, sux at r6.
TSG_NightMare> I own u at r6, newb.
TSG_NightMare> I like penis
by R6 Community March 15, 2003
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10
1. a bad/frightening dream
2. something happening in your waking life that is really traumatic
3. a fictional character from the Soul Calibur game series
1. Bloody hell, that was one bad nightmare, I'm glad it's over now
2. Will this nightmare never end?
3. Hmm, who shall I play as this time? I know, Nightmare
by Online Fan December 19, 2016
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11
A really cool evil knight guy in the Soulcalibur games.
by The Wraith October 05, 2003
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12
nightmare is awsome
by yoshimi December 11, 2003
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13
A sexy man who gets all the girls, therefore becoming your worst Nightmare.
Holy shit! That guy is a fucking Nightmare with the women!
by nightmare January 05, 2003
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14
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 19, 2006
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