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3.
A partner-in-sex. A mate distinctly only for sex. A fuck-buddy.
Sabrina: Why are you hitting on me you have a girlfriend asshole!
Me: Sabrina she's not my girlfriend! She's my sexmate!
by Rey The Word Creator November 20, 2010
 
1.
ocassional partner for occasional sex (any sex)
we are not in love we just have ocassional sex that's why i told he's my sexmate ,duh!
by SACHIKO August 03, 2005
 
2.
your most compatible sexual partner
I don't know if we're soulmates, but I'm sure we're sexmates.
by 'antha January 06, 2011