look up any word, like spook:
 
1.
An adjective:
Incapable of being changed or called back.
He had called me stupid and tried to take back those words, but to me, they were irrevocable.
by gr4mm4rg33k December 08, 2010
 
2.
1. Unalterable; unable to be undone
2. That word on the back of the first Twilight novel that nobody knows how to pronounce, or is really sure of what it means
Guy 1: Dude, Jessica told me her love for me is i-re-VO-cable?
Guy 2: She's been reading Twilight again...get out while you can
by cannonproof25 January 10, 2011