look up any word, like spook:
 
3.
What lighter skinned kids call darker skinned kids.
Whoa! Nice tan, Dark Vader.
by Word Wizzzard November 07, 2006
 
1.
a misspelling of Darth Vader.

If your first foray into Star Wars was a children's book, you probably had never heard "darth" before and may have thought the author made a typo.
Kid reading book: Don't they mean "Dark Vader?"

*kid watches Star Wars*

Ben: ... Darth Vader, who was a pupil of mine until he turned to evil...

Kid: WTF does "darth" mean?
by Herbertismyhomeboy July 31, 2011
 
2.
Somone who is renowned for being shady towards thier "friends", a person who will ditch you instead of include you in an activity.

A type of person who is sly, shady and dark towards their so called "friends", hence contracting the name Dark Vader
BOB: Hey Dave what are you upto tonight? fancy a few beers with the lads?

DAVE: errm errm na errm, i'm really tired, sorry i have to go now... *hangs up*
(Dave is on the way to the pub already)

BOB: *sends text message* - AHHHH HAHAHA YOU LITTLE DARK VADER! I HOPE U DISAPEAR INTO THE SHADOWS DARK ONE!
by GBX March 26, 2008