(imp. & p. p.) of Flip.

balmy bananas barmy bats batty beany bonkers buggy bughouse bugs crackers cuckoo daffy dippy dotty flaky freaked-out fruitcakey fruity gaga goofy haywire just plain nuts kooky loony loopy nuts nutty off the hinges off the track off the wall potty round the bend screwball screwballs screwy slaphappy wacky