A wacky person or thing is someone or something that's unusual and maybe even a bit crazy.
You often hear people use "wacky" to describe something or someone that's quirky or offbeat. For example, if you're watching a TV show about a character who does really strange things, the show might be called "Wacky Wednesday" because it's all about the wacky adventures of that character. People also use "wacky" to talk about their friends or family members who have weird and wonderful habits. If your friend always wears bright pink socks with polka dots, you could say they're a bit wacky! Some people even call themselves wacky because they love doing unusual things, like traveling to crazy places or trying out weird foods. Whatever it means for each person, "wacky" is all about embracing what's different and fun.
(slang, informal) Zany; eccentric.
