slang Wrong. Typically used as an informal, humorous, and more emphatic declaration. A: "I just thought I would take the car out for a spin with Carla." B: "Wrongo, buster! You've still got chores to do." So I know what you're thinking. "If a small glass of orange juice a day is good for me, then a gallon of it would be even better, right?" Wrongo, my friend.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
1. mod. wrong. Wrongo, wrongo! You lose!
2. n. an undesirable thing or person; a member of the underworld. This whole business is a complete wrongo. Something’s fishy.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.