1. People who are obsessively concerned with neatness and orderliness; those who compulsively keep things clean and organized.
Usage: informal; plural form; singular is 'neatnik'; often used with a slightly humorous or critical tone

Examples

• The neatniks in the office always reorganize the supply closet.
• My roommate is one of those neatniks who can't stand a single item out of place.
• Neatniks often spend hours arranging their homes to perfection.
• She's a self-proclaimed neatnik who color-codes her entire wardrobe.
• The neatniks on the team insisted on labeling every file and folder.