An adjective used to describe someone that needs to be made fun of. It can be used in almost any case or scenario. As long as someone is there to be made fun of "dinklefuck" can be the word for you.
Some faggot that tends to run around butt-ass-naked, raping little boys and sucking baby dicks. Doctor Dangledick loves to motorboat little girls' titties, and he loves cooter-kicking old ladies for his profession.
Dave: "Oh look, it's that Danny Dangledick guy sucking off a tiny toddler again, I hope he's having fun."