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1.
Claiming to be heterosexual, but acting otherwise; gay and closeted.
Albert has a girlfriend, but he's Lisexual, so I think I'm going to make a move on her.
by sammerz champmaster May 16, 2012
 
2.
A woman/girl who thinks of herself as a lesbian and will go to many lengths to prove it, though more often they show themselves to be able to be attracted to both sexes.
"Sarah, you're a lisexual."
by jorge m. January 04, 2007