Smeghead

noun informal
An idiot.
Origin
Pairing of smeg (contraction of ‘smegma’) and ‘head’.
Source
Red Dwarf

Gimboid

noun informal
An incompetent person.
Origin
Possibly a pairing of ‘gimp’ and the suffix -oid (resembling).
Source
Red Dwarf

Buttonhead

noun informal
A person implanted with cybernetic sockets for plugging peripherals directly into the brain.
Source
Hardwired

Corpselover

noun
A carnivore.
Source
The Star Diaries: The Eighth Voyage

Chickenhead

noun informal
A mentally retarded person.
Source
Do Androids Dream of Electric Sheep?

Skinjob

noun informal
A Replicant.
Source
Blade Runner