up·tight 
(ŭptīt)
(ŭptīt)adj.
Slang
Slang
1. Tense; nervous: was uptight about turning 50.
2. Rigidly conventional, as in manners, opinions, and tastes: "[She] struck some as uptight or even prissy, a person so private she could be hard to read" (Jane Mayer and Jill Abramson).
uptightness n.