Vulpine in a sentence as an adjective

So the befuddled engineers who remained had to figure out how to modify the code without their vulpine-in-his-own-mind former colleague. They uh, also didn't notice the backdoor he put into the web server that allowed him to spy on their activities, even though he was gone from the company...

Vulpine definitions

adjective

resembling or characteristic of a fox; "vulpine cunning"

See also: vulpecular