controversial

adj

1. Arousing or likely to arouse controversy.

   “Whole libraries of controversial books.”

2. Engaging in or given to controversy; disputatious, argumentative.

noun

1. (archaic)Someone or something (such as a matter or an argument) that is controversial.

   “No fundamental doctrine was omitted. Controversials were carefully avoided. Whether any blessing attended these attempts, will be known at the last day.”

   “Blowing like a blast of fresh astringent air into the hot-house atmosphere of these vapid languors, came news from America of a Rational Dress Campaign. Mrs. Amelia Bloomer’s conspicuous controversials were a wonderful gift to Punch, and were welcomed with enthusiasm and joyful derision by the cartoonists […]”

   “Napoleon’s a pastry / Get this under your brow / All those big wig controversials / Are all commercials now.”

   “Although the numbers of controversial children were few, their finely tuned distinction between types of transgression concurs with the observation that the behaviour of controversials is highly skilled. While the behaviour of controversial children may often meet with negative reactions from peers and reprimands from adults, controversials may engage in even more prosocial behaviour than do popular peers (Dodge, 1983).”

   “It would be interesting to know whether the leadership capacities with which the controversials are credited is a mitigating factor with respect to their risk potential.”