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: "You're one of the nicest people I know." B: "Aw, thanks! Right back atcha!" A: "You act like an idiot sometimes." B: "Right back atcha, you jerk."