What the hell does 'Pfft' mean?

I feel like im always wasting my time. Guys pls ask me to study. Yonna please stop tumblrin, bloging, dreaming or whatsoevahhhhhhh. yeah i admit wasting time is apparently what i do best in life. haha idk what the hell is wrong with me,its like i rather doing nothing at all, just staring at something, for hoursss. Gahhh. i feel like stupido kid. Ppl, pls wake me up. pfft.

final exam starting : 23rd November! 23rd November! 23rd NOVEMBER 2010!