I thought myself cocksure of the horse which he readily promised me.
Pope.
Cock"swain (?, colloq. ?), n. [Cock a boat + swain; hence, the master of a boat.] The steersman of a boat; a petty officer who has charge of a boat and its crew.
Cock"tail` (?), n. 1. A beverage made of brandy, whisky, or gin, iced, flavored, and sweetened. [U. S.]
2. (Stock Breeding) A horse, not of pure breed, but having only one eighth or one sixteenth impure blood in his veins. Darwin.