全軍覆沒的高難度考試 putty exam

　　Putty exam refers to an exam in which the teacher makes so difficult the entire class fails.

　　Putty exam指的是那種全軍覆沒的高難度考試，老師出的題太難，以至于全班同學(xué)都不及格。

　　Example:

　　I better start kissing up after that putty exam.

　　在這種高難度考試結(jié)束后，我最好趕緊巴結(jié)一下老師。