Top Definition
A term used in swinging when the female is allowed to have sex with any other female at the party without the male's consent. This doesn't allow for any sexual contact with any other males.
While at the swinger's party, Kelly got to be bi-straight cause her husband Kevin was cool with her having sex with other chicks.
by lil*jgrrl September 30, 2009
Bistraight is when you like girls more than boys.
"I'm basically bistraight."
"I'm straightbi."
"I'm straight!"
"Get out of here!"
by Jazzyd609 September 06, 2016
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