adj. (American).A superlative often used in the sense of the best or the finest: e.g., the biggest artist, woman, criticism, etc.
1848. RUXTON, Life in the Far West, p. 129. The thermal springs are regarded by the trappers as the breathing-places of his Satanic majesty; and considered, moreover, to be the BIGGEST kind of medicine to be found in the mountains.
1888. Washington (Pennsylvania) Review. The Pittsburg Times is as breezy a journal as comes to this office. It is the BIGGEST little paper we are acquainted with.