He started to wack out after staying up all night.

He always comes up with wacky ideas.

He wore a wacky hat to the party.

He was caught with some wacky baccy in his possession.

He is such a wacko, always coming up with crazy ideas.

The wacko jumped off the roof.

What a wacko idea!

He is a complete wackjob.

The wackos gathered at the park for a protest.

There are always a few wackjobs in every crowd.