subs. (thieves).1. Sheet-lead used for roofing. Fr., doussin; noir. Cf., BLUEY.
2. (old).A blow.
1539. LYNDSAY, Ane Pleasant Satyre of the Thrie Estaitis, Works [LAING, 1879], ii. 73. And to begin the play, tak thair ane FLAP.
2. (common).To pay; to fork out. Cf., FLAP THE DIMMOCK.
TO FLAP A JAY, verb. phr. (thieves).To swindle a greenhorn; to SELL A PUP (q.v.).
1885. Daily Telegraph, 18 Aug, p. 3., col. 1. He and three others of the division had cut up £70 between them, obtained by FLAPPING A JAY, which, rendered into intelligible English, means plundering a simple-minded person.
TO FLAP THE DIMMOCK, verb. phr. (common).To pay. [From FLAP, a verb of motion + DIMMOCK = money]. Cf., FLAP.