pin-head

Noun

pinhead (plural pinheads)

1. The head of a pin. (Frequently used in size comparisons.)
   • The moment the nitre was red hot, the coal, previously reduced to small pieces of the size of a pinhead, was projected in portions of one or two grains at a time…1810, Thomas Thomson, A System of Chemistry, Vol. 4, Bell & Bradfute, page 602
2. (slang) A foolish or stupid person.
   • I don't want to be a pinhead no more / I just met a nurse that I could go for1977, “Pinhead”, in Leave Home, performed by Ramones

   Synonyms:

   doofus, dumbbell, dunce, addle-brain, addlehead, addle pate, airhead, baboon, beanbrain, beetlebrain

3. (slang) A telemark skier.
4. (slang) A human head that is unusually tapered or small, often due to microcephaly, or a person with that trait. Often promoted in freak shows as "human pinheads".
   • The microcephalic idiot is an unfortunate with a "pinhead," sometimes exhibited as a "what's-it" in circus side-shows, whose mental age never goes beyond that of an imbecile.1939, Amram Scheinfeld, Morton David Schweitzer, You and Heredity, Frederick A. Stokes Co., page 155
5. (slang, pet stores) A newborn cricket used as food for pets.
   • A newly hatched gecko will need pretty small crickets, but you will not have to go all the way down to pinheads.1994, Raymond E. Hunziker, Leopard Geckos, Publisher, →ISBN, page 16
6. The immature juvenile fruiting body of a mushroom prior to its gills opening.

See all 7 meanings of pinhead