The Cheah Identity

Mom: Son, you kuat makan isit?
Me: Hah? Fat again?
Mom: Bigger size.
Me: Your comment will be the third one I got in four days.
Mom: Proved that I am right. Seems like you have picked up the Cheah identity....
Me: o.O
Mom: You look at your elder cousins......All seems to be bigger in size when they become elder...bigger shoulders...bigger arms and (looks at my midriff) and that too...
Me: (think of all the cousin brothers) Fat lar?
Mom: Bigger in size...

(long pause)
Me: I didn't know there is a Cheah identity thing...
Mom: Me neither. I just came up with it moments ago...
Me: =_____= ///