How to lose weight without cutting down on food?

The first thing my colleague said to me this early morning...

Why your face so round, over the weekend?

I'm so wished i'm back to UTP, at least their food sucks until you rather skip meal and cook plain rice and eat with soya sauce. I can die without a single scoop of rice everyday. I'm a periuk nasi. ah, that freaking fifth floor to my room. calling out to Utpians, who wants to be my diet+gym+jogging+swimming+sports mate?? we can go mamak after that!

How to get thin when you are getting old together with your damn metabolism rate???