coxcomb

Etymology

From Middle English cokke’s comb.

noun

1. (historical) The cap of a court jester, adorned with a red stripe.
2. The fleshy red pate of a rooster.
3. (by extension) A foolish or conceited person; a dandy.
   Thanks to my stars, I once can see / A window here from scribbling free! / Here no conceited coxcombs pass, / To scratch their paltry drabs on glass; / Nor party-fool is calling names, / Or dealing crowns to George and James. a. 1746, Jonathan Swift, “VII. Another, Written upon a Window where there was No Writing before.”, in Thomas Sheridan, compiler, The Works of the Rev. Jonathan Swift, D.D., Dean of St. Patrick’s, Dublin. […] In Nineteen Volumes, new corrected and revised edition, volume VII, London: Printed [by Nichols and Son] for J[oseph] Johnson [et al.], published 1801, →OCLC, page 361
   And she nearly started a fight between two young fops in plumed hats and flouncy collars: "Clay-brained coxcomb!" "Mewling milk-livered maggot!" 2010, Pseudonymous Bosch, This Isn't What It Looks Like