Fussy definition is quite tricky to comprehend. It refers to someone who is vitally meticulous and disapproving. A persnickety individual typically pay strict attention to detail and sets the bar high when it comes to expectations and flawlessness. Their meticulousness can be seen as admirable, but it can also intensify overly demanding disapproval and avoidable dissatisfaction. Being persnickety is commonly linked to thorough attention to detail but can also be seen as a type of perfectionism.