1) Boring individual 2) Clod 3) Dim bulb, so to speak 4) Dolt 5) Law lord upset fat imbecile 6) No 51A 7) Nonmember of the brain trust 8) Pillock 9) Poor fish 10) Pudden-head 11) Pudding head 12) Simple 13) Simpleton 14) Stupid 15) Stupid person 16) Unclever one 17) Unimaginative one Found on https://www.crosswordclues.com/clue/dullard