Fuck the shit out of you means a guy will fuck the shit out of a girl so hard it’s going to make her cum so hard. It also means he’s going to suck tf out of her clit and lick tf out of her pussy and make her cum hard multiple times. It’s another way of saying I’m going to fuck you so good.
When you have an abusive tendency to suck the life out of people, making them question their reality and leaving them fucking empty inside.
I've been in a long-distance relationship with a narcissist. He's been using sex to squeeze some money out of me, so that I would pay for him to come over.
He shoots back that he "really is going to fuck the life out of me".