Wacko

What a wacko!

She is a wacko.

When I say Yanni is a wacko, that's what I mean.

Yanni was a total wacko.

Robert thought Sandra was a wacko.

“Environmentalist wackos” — Mr. Limbaugh’s phrase — “want man to be responsible for it because they want to control your behavior,” the conservative host said on the show.

"Wacko! There's a whole pile of letters for me," Jennings cried excitedly, hopping from one foot to the other.