Wethead

noun informal
A person without cybernetic brain implants.
Source
The Star Surgeon’s Apprentice

Naffle

verb informal
To travel in a spaceship that is nearly as fast as light.
Source
The Shobies’ Story

Floaking

verb
Practising the life-technique of aggregated skill, luck, laziness and chutzpah.
Origin
Coined by immersers.
Source
Embassytown

Frelk

noun informal
A person who is sexually attracted to spacers.
Origin
Abbreviation of ‘free-fall-sexual-displacement complex’.
Source
Aye, and Gomorrah…

Ziphead

noun informal
A person who has been made into a cognitive computer.
Source
A Deepness in the Sky

Fakebook

noun
A written document stored in electronic form.
Source
Light

Freeboot

verb
Recreational use of the anti-cancer drug Reboot™ for the purpose of experiencing its notable gender-reassignment side effect.
Source
Changes

Autodarwinate

verb
To commit evolutionary self-deselection (suicide).
Origin
Charles Darwin; evolution of species by natural selection.
Source
Accelerando

Spla

adjective informal
A state of intense anger or agitation.
Origin
Possibly a truncation of dysplasia (bad formation) in reference to the idiom “bent out of shape”.
Source
The Word for World is Forest

Sensawunda

noun informal
A street drug that stimulates rapid cognition, having novotrophin-B and MDMA as ingredients.
Origin
Phonetic transcription of “sense-a-wonder”.
Source
Accelerando

Proj

verb
To move at high speed with vigorous effort.
Phrase
Proj on, spoken when one is about to proj.
Source
Virtual Light

Tanj

exclamation
Acronym of “There ain’t no justice” used as an expletive.
Source
Ringworld