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1.
The hair that you have when you wake up, often jumbled.
Oh my gosh that bed hair Jennifer had when she woke up was so cute!
by BedHairIsSOCute August 26, 2011
 
2.
A hairdo that looks like you just finished having sex.
Random friend: "Whoa! Look at Hailey's new haircut! *chuckle* She's got a sexy case of bed hair going on!"
by HaileyTheMonkey February 07, 2009
 
3.
the molting of the pubic hair with the evidence found in beds
Crap ive got bed hair, i wont sleep for a week
by Bucko February 06, 2003