someone of the same sex, usually a celebrity figure, who would cause a straight person to turn gay
Kat Von D is totally a straightbreaker. If I was a lesbian, I'd totally hit that.
by wildflower3915 January 8, 2009
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An individual of the same sex that you will go gay for; an exception to your straight preference.
"Who's your straightbreaker?"
"Oh, mine's Shawn Mendes!"
by T'sway December 23, 2019
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