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Non-functional display unit. Refers to a female who is attractive and even sexy yet has an horrid personality, or is actually a feminist or prude.
Bro don't waste your time with her, she's just another NFDU.
by Kettlebell 78 June 06, 2018
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Non Functional Display Unit

Used to describe a female who looks normal, even attractive but suffers from radical feminism, #metoo disease, or some other issue that makes them hate, despise, and fear males, sexuality, and normal social interaction.
Yes, she is pretty but don't waste the effort, she's an NFDU.
by Kettlebell 78 June 12, 2018
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