bristliest
Having most spines
Bristliest is the superlative of bristly—having the most bristles or the roughest, most prickly texture.
A bristly surface is covered with short, stiff hairs or fibers, like a brush or an unshaven chin.
His was the bristliest beard I'd ever felt.
Figuratively, the bristliest person is the most irritable or quick to take offense.
prickly
Spiny or irritable
rough · stubbly · spiky · abrasive · stiff · raspy · harsh · poky · jagged · barbed
irritable
Easily provoked to annoyance
combative · cantankerous · gruff · surly · tetchy · snappish · curt · brusque · touchy · short-tempered
whiskers
Facial sensory hairs
hackles · mane · coat · pelt · hide · snout · boar · hedgehog · porcupine · catfish