adjective

comically or repulsively ugly or distorted.

a figure wearing a grotesque mask

malformed,deformed,misshapen,misproportioned,distorted,twisted,gnarled,mangled,mutilated,ugly,unsightly,monstrous,hideous,freakish,unnatural,abnormal,bizarre,outlandish,strange,odd,peculiar,fantastic,fanciful,whimsical,weird,freaky,fugly,rum,huckery

noun

a very ugly or comically distorted figure or image.

the rods are carved in the form of a series of gargoyle faces and grotesques