A testosterone-absent male who totally submits and caters to every whim of the woman/women in his life, without contest or issue. Demonstrates no interest in anything outside of being utterly dominated and controlled.
Other similar terms: pet human, slave, pussy-whipped, gutless, ball-less, manwhore, boot licker, metrosexual...
Drinking buddy #1: "Damn, Hector just takes Tawneisha bossing him around and treating him like shit! Without saying a word back!"
Drinking buddy #2: "Yeah, ever since she had him neutered he's turned into a real pussito... poor bastard..."