'Cocked hat' definitions:

Definition of 'cocked hat'

noun

Hat with opposing brims turned up and caught together to form points

From: GCIDE

Cock \Cock\ (k[o^]k), v. t. [imp. & p. p. Cocked (k[o^]kt); p. pr. & vb. n. Cocking.] [Cf. Gael. coc to cock.]
1. To set erect; to turn up. [1913 Webster]
Our Lightfoot barks, and cocks his ears. --Gay. [1913 Webster]
Dick would cock his nose in scorn. --Swift. [1913 Webster]
2. To shape, as a hat, by turning up the brim. [1913 Webster]
3. To set on one side in a pert or jaunty manner. [1913 Webster]
They cocked their hats in each other's faces. --Macaulay. [1913 Webster]
4. To turn (the eye) obliquely and partially close its lid, as an expression of derision or insinuation. [1913 Webster]
Cocked hat. (a) A hat with large, stiff flaps turned up to a peaked crown, thus making its form triangular; -- called also three-cornered hat. (b) A game similar to ninepins, except that only three pins are used, which are set up at the angles of a triangle. [1913 Webster]