jargon.artrocity.com
New Hacker's Dictionary the Jargon File v 4.4.6
[seems to derive from Zen Buddhist koans of the form “Does an X have the Buddha-nature?”] adj. Common hacker construction for ‘is an X’, used for humorous emphasis. “Anyone who can't even use a program with on-screen help embedded in it truly has the loser nature!” See also the X that can be Y is not the true X. See also mu.