prick-ear, n. — Green’s Dictionary of Slang

prick-ear n.

[prick-eared adj. (2); the Roundheads and Puritans were typified by their tight-fitting black skullcaps, which sat above the ears]

a Roundhead, a Parliamentarian, ‘a Crop, whose Ears are longer than his Hair’ (B.E.).

1642		Grand Plutoes Remonstrances [title page] How far he differs from Round-head, Rattle-head or Prick-eare . 2. His Copulation with a Holy Sister.
1642		J. Taylor Answer to the Rattle-heads 3: As for Prickears, I do not admire at your expression.