whacky

[ hwak-ee, wak-ee ]
/ ˈʰwæk i, ˈwæk i /
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adjective, whack·i·er, whack·i·est.

Slang. wacky.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for whacky

whacky

/ (ˈwækɪ) /

adjective whackier or whackiest

US slang a variant spelling of wacky
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012