老班的驴脸最欠揍了
[lăo bān de lǘ liăn zuì qiàn zòu le]
'Teacher's Donkey Face Really Asks For Punches.' This slang phrase expresses discontent or ridicule towards someone (usually teachers or authorities) with whom you disagree or find frustrating. Such expressions, while direct, might get people in trouble when directed towards authority figures and therefore should be used with caution.