Verb: to borrow, in a permanent manner. To borrow with neither inclination nor intent to return.
Last summer, I permaborrowed my buddy's sweater.
by Scaryberry January 21, 2004
To borrow something from someone when you clearly have no intention of returning it or you intend to wait and see if they ever ask for it back.
I perma-borrowed my neighbor's lawn mower 14 months ago and he still hasn't asked for it back.
by College Professor March 23, 2008