Wiktionary
adv. 1 In a sadistic manner. 2 In a particularly horrible or brutal manner, as painfully as possible.
Usage examples of "sadistically".
Fred were in the habit of sexually and sadistically abusing young girls in the cellar of their house for their joint pleasure.
Rolling Stones cackled sadistically at full volume on the radio, Herbie shifted into reverse, and, without looking backward, furiously popped the clutch, causing his wonderful convertible to bolt back onto the dirt road and directly into a rattletrap pickup barreling along at a high rate of speed.
He dreamed he was a ballet dancer and someone had tied red shoes to his feet that forced him to dance on and on, while the ballet master, an aged poofter, looked on and smiled sadistically.
Gleto added his blows to my painful back, grinning sadistically at my yelps.
The judges were sadistically relishing the delay, making a pretence of consulting each other and writing up their notes, but in reality testing Dandy Lass to the outside limit of her endurance.