Fussy meaning is somewhat hard to grasp. It refers to someone who is exceedingly picky and nitpicking. A persnickety individual typically pay strict attention to detail and has high standards when it comes to standards and flawlessness. Their attention to detail can be seen as admirable, but it can also intensify extreme criticism and avoidable dissatisfaction. Being persnickety is often related to exact attention to detail but can also be seen as a form of obsessiveness.