G.S.I. Gross Sexual Imposition
G. S. I. is when someone tries to sexually touch you, but no real sex happened. If they had sex with you before, it's still G. S. I. unless there's proof like hair or cum.
He tried to touch me, but I said 'no cum, no G. S. I.'
She had sex with him before, but this time he just grabbed her arm. I called it G. S. I.
He tried to touch me during class, but I said 'no evidence, no G. S. I.'