exactamundo

ex·act·a·mun·do

 (ĭg-zăk′tə-mŭn′dō)
adv. Slang
As you say. Used to indicate agreement.

[Probably alteration of Spanish exactamente, exactly (influenced by Spanish mundo, world).]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.