tsk tsk tsk!

have you every wonder what does "tsk tsk tsk" mean?
or maybe you know what it means..
I, myself actually don't know what does it stands for
until someday I figure it out on my own~
and just now, Yingyi was asking me what is that.
and I explained it to her...
I was telling her to imagine the sound that lizards always make
and guess what, she don't even know how a lizard actually sounds like!
lol...
so if anyone of you don't know how a lizard sounds like
then you're welcome to find me! xD