When calling someone "-2 IQ", this means that the person believes there are more than 2 genders. If they do know there are only to genders, they are then called a "genious".
Guy1. Dude... This chick has -2 IQ...
Guy2. Bro, does she not understand you either got a dick or don't?
Guy1. I don't know bro, she kinda stupid.
by SupremeLeaderBro August 7, 2021
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