When someone or something gets you to "flip". If you are happy, then someone or something suddenly makes you unhappy. If you are neutral, then someone or something turns your emotions in either direction. If you are sad, and someone or something suddenly makes you happy. Basicallyin the moment, your emotions turn the other way.
Turnt often means drunken or rowdy, however, it can simply be an alternative past-tense of turn rather than turned to better match words such as learnt, burnt, lit, spilt, spelt, et cetera, though essentially ones like burnt, and learnt for verbs that end with I tend to have their past-tence be that with a T rather than an ed; but almost always, at least in American-english it means something along the lines of drunk and/or rambunctious.
"And finally they turnt around, and I saw their face" is an example of a sentence that uses it as a simple alternative to turned whereas "oh, boy, was I turnt up" is an example of how ro use it as in drunk or rowdy.