Bump and Grind or bump-and-grind refer to various kinds of rough movement, e.g.
双语例句
1
He fall off the ladder and landed bump on the grind.
他从梯子上砰的一声跌到地上。
2
After many years in the bumpandgrind, and perhaps hardship, of reality in the working world, many people will tell you that their school years were some of the best times of their lives.