Pants on (Sa)fire: Pedantic warmonger William Safire, guest-blogging for Oxford University Press, claims to have made up the verb "consense":

As a language columnist, I feel free to coin a neologism now and then; “consense” is a verb that can replace “form a consensus”. Not the opposite of “nonsense”.
Anyone who has spent even a little time around left-wing politics and activism has heard "consense" used in exactly this way a hundred times. Wiktionary has several citations, including one from 1970 -- a speech by pioneering gay activist Harry Hay. Looks like the queers beat you to that one, Bill!