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1.
Distinctively messed up hair that manifests after having sex.
I hate it when my mom has sex head, cause that's shit I just don't wanna know about.
by Dungheap May 25, 2006
 
2.
When you get bedhead and you weren't sleeping.
Co-worker 1: "Did you see Sarah's hair when she came out of the elevator with Jim? I bet she didn't look like that when she got on..."
Co-worker 2: "That was some serious sexhead."
by misspelld June 02, 2010