Verb. Sap.:

Didn't know of this Latin abbreviation until I ran across it in Justice Scalia's Youngblood v. West Virginia dissent today. It's apparently short for verbum sapienti, which means "a word to the wise [is enough]." Learn something new every day; I can't say I'm likely to use it in my own prose, but at least now I'll understand it when I see it elsewhere.