longs-and-shorts, n. — Green’s Dictionary of Slang

longs-and-shorts n.

[one or more edges of such cards have been shaved for recognition during a shuffle or deal]

cards purpose-made for cheating.

1864, 1867, 1870		Hotten Sl. Dict.
1919		Mirror (Sydney) 31 Aug. 8/2: In banker, ‘longs and shorts’ are frequently, used. The cards are shaved on the ends, and the player knows when he is cutting a high card or a low one.
1968		J. Alard He who Shoots Last 39: You don’t trim anyone with a deck of longs and shorts.