coxcomb \KOKS-kohm\, noun:
1. obsolete. A cap worn by court jesters; adorned with a strip of red. (Now cockscomb).
2. archaic. The top of the head, or the head itself.
3. Obsolete. A fool.
4. A vain, showy fellow; a conceited, silly man, fond of display; a superficial pretender to knowledge or accomplishments; a dandy; a fop.
"If thou follow him, thou must needs wear my coxcomb." -- William Shakespeare, King Lear
Courtesy of Dictionary.com