Noun: a dirty scumbag; usually used to describe an individual who has seriously fucked you over. More specifically, it is more of a ramming-your-pants-down-to-your-ankles followed by a repeated anal-insertion-with-no-lube kind of fuck-over. (It's pretty bad.)
Example 1: "What a prick fuck!"
Example 2: "You prick fuck!"
Example 3: "Hey, you're a prick fuck, you asshole!"
What one is forced to do when trying to have sex with an obesefemale, and does not have any flour handy to roll her in to help search for the wet spot.
Pick a random flap of fat and proceed to fuck it.
I was so drunk last night I went home with a fat chick and I had to pick a flap and fuck it!