1824Rat-printer [see sense 4f]. 1914 27 Mar. 1/5 Kelly..is a rat printer and has been denied permission to even enter the halls of a number of unions.
1998 T. Messer-Kruse iii. 87 Anthony defended herself against the charge of aiding nonunion, or ‘rat’, printers by asking just how many women Walsh's union had trained in the art of typesetting.