In a doggy style position the woman reaches between her legs and slaps the shit out of the mans penis and nut sack, often causing either stimulation or great pain depending on the power between the slaps.
"That bitch chicken slapped my cock so hard I have to wear an icepack."
Violent, furious, repeated slappings of the penis and genital region. The act mimics a cock fight. Prolonged sessions of chicken slapping usually result in large, wide chodes.
"Weghorst quit chicken slapping in the bathroom."