Originally developed when The Rock was wrestling in the WWF/WWE, "The People's Eyebrow" was a threat indicated by the raising of one eyebrow while lowering the other, tilting the head, and staring into the eyes of an opponent.
This look - often accompanied by a quick zoom of the camera angle - indicated that the targeted opponent needed to know his/her role and shut his/her mouth.
It was often followed by a reference to the eyebrow, and the phrase, "Can you smell...what The Rock...is cookin'?