subs. phr. (pugilistic).A clean blow; a hit full on the mark and straight from the shoulder. For synonyms, see DIG.
1891. Licensed Victuallers Mirror, 30 Jan., p. 7, col. 2. Landed a very heavy FLUSH HIT on the mouth.
Adv. (colloquial).Full; straight; RIGHT ON (q.v.).
1888. Sporting Life, 15 Dec. Both cautious, Wilson with marked frequency leading off, and getting the left FLUSH on the face.