example 1:
Stud thinking: "I need to give it more slappage, a lot more come on ya bitch get screamin"

example 2: man and wife in bed
Woman : "Oh for gods sake Derek give it some fuckin arsehole slappage will you, come on swing them bollocks like a pair of demolition balls"

Damn, I fucked the shit outta that bitch. It was pure slappage.