1. a definition made for when two people have sexual intercourse and successfully.. A really good fuck!
2. when a woman is trying for a baby and then falls pregnant after successful intercourse
1. Guy1: Where did you go last night man?
Guy2: Stayed round Kacey's
Guy1: Ohhh yeaahhh you missed a good night out you knowww...
Guy2: Yeah but i had a successfuck........
2. Guy1: Me and my bitch had a successfuck a couple of months ago, its a boy.