Green’s Dictionary of Slang

(prizefighting) used with a variety of nouns showing parts of the body, to denote a blow and its target, e.g. noser n. (1), facer n.² (1), ribber n. (1), ogler n. (2), etc, similarly with v. e.g. cracker n.⁵ (1), grasser n.¹ (1), grounder n. (1), stopper n.¹ (1), etc.