1. fussy about food; hard to please when eating
2. requiring great care, attention, or precision; easily disturbed or made to malfunction

Examples

• My little sister is finicky about vegetables and will only eat carrots.
• The old printer is finicky and often jams if you use the wrong paper.
• He's finicky about how his coffee is prepared.
• This finicky engine needs regular maintenance to run smoothly.
• She's finicky about keeping her workspace organized.
• The camera's autofocus can be finicky in low light.
• My dog is finicky and refuses to eat the same food every day.