gotta
not standard uk/ˈɡɒt.ə/ us/ˈɡɑː.t̬ə/
（have got to的简略说法）
short form of have got to
I gotta go now. 我得走了。
He's gotta be kidding. 他一定是在开玩笑。
Idiom
a man's gotta do what a man's gotta doidiom saying 该做的你就得做；上天入地也得做
said to mean that you will do whatever you have to do, even if it is difficult or dangerous