Esp. as an intensifier, in depreciative or derogatory contexts: answering fully to the description; thorough, complete; perfect. Now colloquial.

transferred of things, i.e. opprobrious deeds and qualities, theft, presumption, lie, device, etc.

Used as an intensive with nouns of reproachful sense: Thoroughgoing, ‘unmitigated’: see arrant, adj. 3a 3b.

Of evil or vice: not tempered by any good quality or feature; unmitigated, utter. Obsolete.

Unmitigated; unalleviated; not tempered by any good quality or feature.

gen. Pure, unmixed, utter, downright, sheer, absolute (with a negative or privative force).

ironic. Of the worst or most extreme kind.

Excellent or outstanding, so as to merit a prize; best. Now chiefly in ironic use, with reference to undesirable qualities: complete, utter, or…

= fucking, adj.