twerp

fool, idiot, tomfool, wiseacre, simpleton, witling, dizzard, donkey, ass; ninny, ninnyhammer; chowderhead, chucklehead; dolt, booby, Tom Noddy, looby, hoddy-doddy, noddy, nonny, noodle, nizy, owl; goose, goosecap; imbecile; gaby; radoteur, nincompoop, badaud, zany; trifler, babbler; pretty fellow; natural, niais., child, baby, infant, innocent, milksop, sop., oaf, lout, loon, lown, dullard, doodle, calf, colt, buzzard, block, put, stick, stock, numps, tony., bull head, dunderhead, addlehead, blockhead, dullhead, loggerhead, jolthead, jolterhead, beetlehead, grosshead, muttonhead, noodlehead, giddyhead; numbskull, thickskull; lackbrain, shallowbrain; halfwit, lackwit; dunderpate; lunkhead [U.S.], sawney, gowk; clod, clod-hopper; clod-poll, clot-poll, clot-pate; bull calf; gawk, Gothamite, lummox, rube [U.S.]; men of Boeotia, wise men of Gotham., un sot a triple etage, sot; jobbernowl, changeling, mooncalf, gobemouche., dotard, driveler; old fogey, old woman; crone, grandmother; cotquean, henhussy., greenhorn (dupe); dunce (ignoramus); lubber (bungler); madman., one who will not set the Thames on fire, one who did not invent gunpowder; qui n'a pas invente la poudre; no conjuror.