Meaning

adjective without qualification; used informally as (often pejorative) intensifiers

originA variant of errant, from Middle English erraunt [and other forms], from Anglo-Norman erraunt, from Old French errant, the present participle of errer (“to walk (to); to wander (to); (figuratively) to travel, voyage”), and then: * from Vulgar Latin iterō (compare Late Latin itinerō, itineror (“to travel, voyage”)), from Latin iter (“a route (including a journey, trip; a course; a path; a road)”),…

Etymology from Wiktionary, CC BY-SA 3.0