Uptight = high strung = jittery = nervy = jumpy

Uptight adj. Slang

1. Tense; nervous
2. Financially pressed; destitute
3. Outraged; angry
4. Rigidly conventional, as in manners, opinions, and tastes: “She sees this headlong, headstrong, plunge into worldliness as a protracted process of shucking the shame of her uptight upbringing” (James Wolcott).

Am I 'uptight'? Some say I am... but I beg to differ. Being uptight sounds like hard work. I am who I am, without any extra effort. Does that make me uptight? Hmm...