This is a variant of the word "incel". It refers to people whose attractions are based upon gender, that have no luck dating people whose attraction is based upon sex. An ingisp (involuntary not getting into supersexual pants) will try to transplain why you should still be attracted to this person, but to no avail.
John: Come on, man, why won't you date me?
Peter: Because you have a pussy, man, I'm only into men with penises.
John: That doesn't matter, bro, I'm as much as man as any other!
Peter: I'm supergay, you're just being ingisp. Grow up.
by supersexualities May 9, 2021
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