porkpie hat(n = noun.artifact) porkpie - man's hat with a low, flat crown and a snap brim;
is a kind of snap-brim hat

bad hat, billycock hat, bishop's hat, bowler hat, brass hat, campaign hat, cavalier hat, church hat, cocked hat, cowboy hat, derby hat, dress hat, felt hat, fur hat, gainsborough hat, hard hat, hat, hat shop, hat trick, high hat, iron hat, mexican hat, old hat, opera hat, panama hat, picture hat, pith hat, plug hat, porkpie, safety hat, service hat, shovel hat, silk hat, slouch hat, straw hat, sun hat, ten-gallon hat, tin hat, top hat, woman's hat