Vulky was a slang term used in the 24th century by some Humans as an adjective, a shorthand allusion to the Vulcan species. As such, it suggested a person driven purely by logical concerns, often to a boring, pedantic, or tiresome extent.

The term was used by Jeffrey, The Doctor's holographic son in his family program. (VOY: "Real Life")

It was also used by Kathryn Janeway in the Voyager novel Mosaic. The specific reference is to "vulky Hobbes Johnson."
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