'crazy idea' definitions:
- absurd idea,
- boutade,
- brainstorm,
- capriccio,
- caprice,
- conceit,
- crank,
- craze,
- crotchet,
- fad,
- fancy,
- fantastic notion,
- fantasy,
- flimflam,
- fool notion,
- freak,
- freakish inspiration,
- harebrained idea,
- humor,
- kink,
- maggot,
- megrim,
- notion,
- passing fancy,
- quirk,
- toy,
- vagary,
- whim,
- whim-wham,
- whimsy
