Hoppy, bitter, and moderately strong like an American IPA, but with some caramel, chocolate, toffee, and/or dark fruit malt character as in an American Brown Ale. Retaining the dryish finish and lean body that makes IPAs so drinkable, a Brown IPA is a little more flavorful and malty than an American IPA without being sweet or heavy.
Previously might have been a sub-genre of American Brown Ales, hoppier and stronger than the normal products, but still maintaining the essential drinkability by avoiding sweet flavors or a heavy body or finish. The hops and malt can combine to produce interesting interactions.
Dogfish Head Indian Brown Ale, Grand Teton Bitch Creek, Harpoon Brown IPA, Russian River Janet's Brown Ale