cancervative adjective 1noun 1forms 3 adjective1 •(offensive, rare) Of or pertaining to a harmful conservative ideology or politics.Maybe you can start a cancervative idiot version of the Friars Club! — 2006 noun1 •(offensive, rare) A conservative, particularly a harmful one.Just one more ignorant reply from one more ignorant 'cancervative. When will they ever learn, just because they can't comprehend something, just shooting it dead is NOT the only answer. — 2003 formscancervatives · more cancervative · most cancervative