Definition of fool of a
- Only that fool of a brother of yours would ask such a silly question!
: a person lacking in judgment or prudence
: a retainer (see 1retainer 1) formerly kept in great households to provide casual entertainment and commonly dressed in motley with cap, bells, and bauble
: one who is victimized or made to appear foolish : dupe
: foolish, silly
: to behave foolishly
: to meddle, tamper, or experiment especially thoughtlessly or ignorantly
: to play or improvise a comic role
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