Galloper \Gal"lop*er\, n. 1. One who, or that which, gallops. [1913 Webster] 2. (Mil.) A carriage on which very small guns were formerly mounted, the gun resting on the shafts, without a limber. --Farrow. [1913 Webster] {Galloper gun}, a light gun, supported on a galloper, -- formerly attached to British infantry regiments. [1913 Webster]