bookoo
boo·koo
(bo͞o′ko͞o′)adj.n. & adv. Chiefly Southern US
Variant of beaucoup.
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.