A guess about future events regarding whether you'll "get some" from a guy.
Making a predicktion about future sexual pleasures is all well and good, but it can also warn if da "generous with his sausage" dude in question is gonna be a real you-know-what in his attitude and overall treatment of you.
Derived from "PERFECTIONIST," with the second "E" replaced with "U", to add the "FUC-" sound, as in the word "FUCK".
Noun: A person who is a total prick about being a perfectionist. One who cannot finish a task without checking it over again and again, or who does something repeatedly until s/he achieves the desired result. When this behavior annoys others, the person exhibiting the behavior is a "perfuctionist".
A: Oh, he's skipping lunch today, because he's being a "perfuctionist" again. He's rewriting his proposal to present to the Board of Directors this afternoon.
Perfucktion is an adjective that describes someone whom you would never date, but would totally fuck if you got the chance.
Katie Holmes is perfucktion, I would NEVER date her because she's a monsoon of bitchyness; but given the chance, You bet I'd totally tap that sweet ass.