The fact is, Shakespeare used language in a creative way: Take what is probably the best (worst) insult ever written, from King Lear:-
"A knave; a rascal; an eater of broken meats; a base, proud, shallow, beggarly, three-suited, hundred-pound, filthy, worsted-stocking knave; a lily-livered, action-taking knave, a whoreson, glass-gazing, super-serviceable finical rogue; one-trunk-inheriting slave; one that wouldst be a bawd, in way of good service, and art nothing but the composition of a knave, beggar, coward, pandar, and the son and heir of a mongrel bitch.
It makes you wonder if he's to blame for negative attitudes towards dogs too.)