adjective
wacky
WAK-ee
adjective
1
Amusingly odd, silly, or eccentric.
"The kids came up with a wacky plan to build a treehouse fort."
"She has a wacky sense of humour that always makes meetings more fun."
How to Use Wacky
Learner’s notesIn plain EnglishFun, silly, or a little crazy in a harmless way.
Common pairings
wacky idea
wacky humour
wacky races
Word Forms
wackier comparative, wackiest superlative
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The kids came up with a _____ plan to build a treehouse fort.
Etymology
From "whack" — originally describing someone who'd taken one too many knocks to the head, hence "odd" — plus the adjective-forming suffix "-y".