From the word Pussy but with more meaning which implies that whoever is called a Pussio is:
Coward
Gay / Faggot
Weak
Beta Male / Project Male
Doesn´t live in reality
Does not do anything at all
Terminator 1: Have you seen that guy named Lebroski Patrik Bitchski?
Terminator 2: Yeah I heard he still lives in his parent's basement at 27, is fat with no chick or rizz but talks on the internet that women and men are equal and has 100 followers & is a discord/reddit mod
Terminator 1: Oh shit! He is a Pussio! Must be a faggot too