Oaf

(n.) Originally, an elf's child; a changeling left by fairies or goblins; hence, a deformed or foolish child; a simpleton; an idiot.

Thesaurus Entries

babe, baboon, beast, blockhead, blunderbuss, blunderer, blunderhead, boob, booby, boor, botcher, bruiser, brute, bull, bumbler, bumpkin, bungler, child, child of nature, chump, clod, clodhopper, clodknocker, clot, clown, dolt, dolthead, dove, dub, dupe, fathead, fumbler, galoot, gaum, gawk, gawky, gorilla, gowk, hayseed, hick, hulk, infant, ingenue, innocent, klutz, lamb, lobster, looby, lout, lubber, lug, lummox, lump, meathead, mere child, missing link, noble savage, ox, palooka, rube, simple soul, slob, slouch, slubberer, unsophisticate, yokel