北京儿童野外拓展训练:what does the idiom"the fat lady thing"mean?

what does the idiom"the fat lady thing"mean? what does the sky cry? what countries does the middle east include What does Paul do with the wheel? what does the G.L. generaion mean ? what does the meaning of karate-do ? What does the Solvey process manufacture? the similiar Chinese idiom what does the EA stand for? in the following sentence... what does "play in the hey" mean?