Synonyms and related words :
asshole, babe, bean, boob, booby, butt, champ, chaw, chew, chomp, cinch, conk, credulous person, crunch, cull, ding-a-ling, dingbat, dingdong, dolt, dolthead, dome, dupe, easy mark, easy pickings, fall guy, fathead, fish, fool, galoot, gobe-mouches, goof, greener, greenhorn, greeny, gudgeon, gull, head, headpiece, innocent, jerk, jerk-off, klutz, leadpipe cinch, mark, masticate, monkey, munch, mutt, noddle, noggin, noodle, oaf, patsy, pigeon, plaything, poll, prize sap, pushover, ruminate, sap, saphead, sawney, schlemiel, scrunch, sitting duck, stooge, sucker, toy, trusting soul, victim,