This is the person who reminds the teacher about the homework. The one who separates their M&Ms by color before eating them. The one who uses a level to hang a post-it note.

An inability to relax. A deep, religious devotion to rules, receipts, and being "technically correct" (the best kind of correct, according to them). They are frugal to the point of reusing dental floss. They are rigid. They are... wound up.

The phrase “tight ass” is a linguistic unicorn. It’s a glorious, confusing, two-faced idiom that lives in two completely different worlds: the world of fitness and the world of personality flaws .