Top Definition
(n), (c)
1) someone from Chongland who repeatedly posts the same message in a message board or forum

2) someone of Korean descent who repeatedly demands an apology and compensation from Japan for his/her PostColonial Possession Stress Disorder

3) someone of Korean descent who lives by asking people for food and money
1) We’ve got a large number of Niddars in the 2ch BBS.
2) a sissy Niddar
3) the lazy Nidders on the Korean peninsula
by Shineya Chong October 07, 2005

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