He's as finicky as a cat. 10.She's the world's number one fusspot. 11.He's such an anal retentive person. 12.Men don't like women who nag. 13.He's penny-wise and pound-foolish.
It's related to anal retentive fixation, which is supposedly the result of unresolved conflicts between you and your caregivers during potty training But like so many things Freud thought it's kind of bogus.