Fugacious in a sentence as an adjective

But you must find your motivating above this fugacious desire to be contrarian among your peers.

My experience with FreeBSD is limited to a fugacious week with apparent quixotism and my noble Raspberry-Pi2, which ended inimically.

Fugacious definitions

adjective

lasting a very short time; "the ephemeral joys of childhood"; "a passing fancy"; "youth's transient beauty"; "love is transitory but it is eternal"; "fugacious blossoms"

See also: ephemeral passing short-lived transient transitory