Something of an extremely disturbing nature, capable of inducing nightmares or other trauma. This is often something not meant to be disturbing. Popularized by "Mystery Science Theater 3000" and, later, James Lileks.

someone who is sexy beyond mean

An idea or concept that fuels nightmares or otherwise causes extreme emotional distress. Attributed to James Lileks (www.lileks.com).

The remains left in the toilet after a violent session of "spray and pray", Induced by daily work cafeteria food.

The remains left in the toilet after a violent session of "spray and pray", Induced by daily work cafeteria food.