Top Definition
a spin off of darth sidious..usually referring to some ugly girl on the internet
man that sif on myspace is might even call her a sif lord...or darth hideous
by l337dod November 28, 2005
Any girl that a friend of yours is dating, who is uglier than sin, and whose looks are comparable to those of Darth Sidious
Man, what is with Keenan dating Darth Hideous?
by Derelict Myballs February 07, 2009
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