Quick Definition: A series of negs one after the other, usually done using cocky funny and in a playful manner.
(Credit B.M. Mixin)
Negs were invented in the original MM specifically for use in gaming 9s and 10s. A neg roll is a series of negs that is calibrated for the girl. This type of game is rarely played, but sometime necessary for highly qualified girls or girls with high bitch shields.
A neg calibration is a IOI, apology, or reward for an overly harsh neg. Neg rolls need to be used carefully and must fit into the overall tonality of teasing from a place of endearment and fun, as opposed to hatred and negativity. Otherwise, the PUA will seem overly mean and trigger negative responses, as no one likes to be continually insulted.
That was a great series of neg rolls on the HB, perhaps more calibration?