The word “ruthless” might be common coin in descriptions of Southern underground rap, which is known for pungent, whiskey-sluiced rhymes and gravelly beats. While Cunninlynguists exalt the swampy sounds of their homeland, their second LP lapses into more groove-driven boom-bap overlaid with strings, blues contralto samples and melancholy piano. Rhymes oscillate from buoyant MC prattle about Cadillac grilles-as in their infectious homage track for “The South”-to angst-riddled soliloquies about the creeping hand of war. But for the occasional clich?-like the gauche yee-haw from “DJ Billy Bob”-Cunninlynguists have a peppery wit and a knack for double entendre.