Fussy definition is fairly difficult to understand. It refers to someone who is exceedingly picky and fault-finding. A persnickety individual typically pay strict attention to detail and has high standards when it comes to criteria and flawlessness. Their meticulousness can be viewed as laudable, but it can also magnify overly demanding criticism and avoidable dissatisfaction. Being persnickety is frequently related to precise focus on specifics but can also be seen as a type of pedantry.