Nightmare 

Siegfried Schtauffen from the Soul Edge/Calibur series after gripping the cursed hilt of Soul Edge. As Siegfried, carries a massive Zweihander named Faust, or another named Requiem. Probably the best character in the SE/C series. Appears in full platemail armor in SE, without helm in SC/SCII, or as Nightmare, in full plate with his right arm exposed, looking as though it were torn off of a demon and surgically placed over his own arm.

"I will show you...the GREATEST nightmare!"

Nightmare by Nightmare April 16, 2004

nightmare 

Ann Coulter becoming president.

"It's my opinion women shouldn't vote"
"Apartheid in South Africa was justified, they were surrounded by savages."
-Ann Coulter"
Ann Coulter being president would be a nightmare.

nightmare by Tim Brawner November 23, 2007

Nightmare 

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!

Nightmare by Nightmare May 13, 2005

NightMare 

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

NightMare by R6 Community March 15, 2003

nightmare 

A really cool evil knight guy in the Soulcalibur games.

nightmare by The Wraith October 5, 2003

nightmare 

great band who i cant get enough of.

nightmare is awsome

nightmare by yoshimi December 11, 2003

Nightmare 

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?!?

Nightmare by Jason Nudelman November 10, 2008