or jolter-headed, adj. (old).Stupid; dull; CHOWDER-HEADED (q.v.).
1690. DURFEY, Collins Walk through London and Westminster, C. 11. p. 56. Insensible JOLT-HEADED fool.
1754. MARTIN, English Dictionary, 2nd ed., s.v. Chub, chub a JOLT-HEADED fellow.
1849. BULWER-LYTTON, The Caxtons, III. iv. A worthless, obscure, JOLTER-HEADED booby in mail, whose only record to men is a brass plate in a church in a village!
1877. GREENWOOD, Dick Temple, ch. xxiv. It might be also that in his JOLT-HEADED way he really was a faithful dependent.