Noun
Conehead (plural Coneheads)
(fiction) One of a fictional race of humanoid aliens with conical skulls.
Conehead (plural Coneheads)
(sports, fandom slang, slang) A fan of baseball pitcher David Cone.
Alternative form of Conehead
(fashion) A foam rubber rounded cone hat to be worn atop the head as a costume to appear to have a conical bald skull.
An insect of the katydid subfamily Conocephalinae.
Any member of the order Protura of insect-like arthropods.
(anthropology, archaeology, informal) A person who has undergone cranial modification in order to produce an elongated skull.
(Australia, slang) A person addicted to smoking marijuana with a bong.
(slang) A pinhead, a stupid person.
Source: en.wiktionary.org