Demanding definition is rather tricky to comprehend. It refers to someone who is exceptionally particular and critical. A persnickety individual often be meticulous and does not settle for less when it comes to expectations and flawlessness. Their attention to detail can be perceived as commendable, but it can also exacerbate unreasonable censure and avoidable dissatisfaction. Being persnickety is typically associated with thorough focus on specifics but can also be seen as a type of perfectionism.