When your sexual partner does a sucking motion while using
teeth on an unfairly thin area of
skin on the body. This area of
skin is usually the side of the scrotum,
gooch, under the arm, or even inner thigh. This action may ONLY be referred to as a niblick if a visible red mark which does not disappear immediately is present. A perfect niblick is met with some degree of
pain felt instant and afterward. Essentially, this is a more sexually charged hickey with more teeth, and a purpose.
Disclaimer: I do not recommend being the recipient of a niblick, and the intentions of the giver may vary from inexperience, fun, kink, and/or spite.
Guy 1: "Man, I was with this lady last
night (or so I thought), and I sobered up in the morning with this
pain on the side of my nutsack! Dude, she gave me a hickey on my nutsack,
bro!"
Guy 2: "You idiot, she gave you a niblick!"
Guy 1: (facepalms) (vows to never drink again).