Definition of ass-ear in English:

ass-ear

Pronunciation /ˈasˌɪə/

noun

(also ass's ear)
  • An ass's ear. Also: an adornment resembling the ear of an ass conventionally attached to the hood or cap of a fool. Usually in plural.

Origin

Middle English; earliest use found in Ancrene Riwle. In some forms from ass + ear.