[Origin obscure: sense 1 may be humorously from KICK sb.1]
1. An indentation in the bottom of a glass bottle, diminishing the internal capacity. Also kick-up.
1861. Mayhew, Lond. Labour, II. 451. You must know, sir. that some bottles has great kicks at their bottoms.
1876. Blackmore, Cripps, x. 59. He kept them in bottles without any kicks.
1899. Blackw. Mag., Feb., 396/1. These were the kicks of bottles whose long snouts were thrust into wooden racks.
2. The projection on the tang of a pocket knife blade, which prevents the edge of the blade from striking the spring.
1864. in Webster.
3. In brickmaking: The piece of wood fastened to the upper side of a stock-board to make a depression in the lower face of a brick as moulded. (Knight, Dict. Mech., 1875.)