Smeghead

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

Gelf

noun
Acronym of “genetically-engineered life form”.
Source
Red Dwarf

Gimboid

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

Deathday

noun
The anniversary of a person’s death, celebrated posthumously by a computer simulation of the deceased.
Source
Red Dwarf