An exclamation used to express the same sentiment back to the original speaker; same as "you too" and "same to you." ("atcha" is a colloquial contraction of "at you.") Primarily heard in US, South Africa. A: "I hope you have a great day!" B: "Back atcha, buddy!" A: "You're a real jerk, you know that?" B: "Back atcha!"
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.