coxcomb (the sense of ‘fool’ is most freq.)
1.
cap worn by a professional fool,
like a cock's comb in shape and colour Wiv. V. v. 149, Shr. II. i. 224, Lr. I. iv. 117.
2.
ludicrous appellation
for the head Wiv. III. i. 91,
Tw.N. V. i. 180
“a bloody ,”
H5 V. i. 45, Lr. II. iv. 125.