driving my mom to her grave

i thought this was quite a good one, by my brother.. but it only sounds funny when it's in chinese..

my mom (pointing to a mess my brother created): (angrily) zhe4 shi4 she3 me4 yi4 si4?
english translation: what do you mean by this?

my brother: (cheekily) bu4 hao3 yi4 si4

sorry if it sounds lame to u