v. dial. Also fullock. [Of obscure origin; cf. FULKAT.] (See quots.) Hence Fullocking vbl. sb.
a. 1784. in Milles, MS. Gloss. (Halliw.).
1796. Grose, Dict. Vulg. Tongue (ed. 3), Fulk, to use an unfair motion of the hand in plumping at taw. Schoolboys term.
1843. Peter Parleys Annual, IV. 311. Come, down with your tawno fulking . I like to see boys manly, even in their boyhood.
1874. Halliwell, Fulk, a phrase made use of by boys playing at taw, when they slily push the hand forward to be nearer the mark. Fullock, to jerk the hand unlawfully. A term at marbles.
1869. Peacock, Lonsdale Gloss., Fullock, to jerk the hand and arm unlawfully at marbles, instead of shooting from the thumb-joint, with the hand perfectly steady.
1875. Whitby Gloss., Fullock, to fire a marble from the hand, by a jerk of the bent thumb. That was well fullockd.