From the Cut n Paste
" In the bag", 是肯定有把握或稳操胜算的意思。这一个用词出自打猎,猎人将猎物袋进猎囊(Game-bag)里。
Example
'If i do well on my examination my promotion will be
in the bag, ' ahlang said.
She is saying that her promotion is assured.
It is a certainty. There can be no doubt about it.
" Once you have been promoted your future will be in the bag," her father smiled.
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For me
My bag so heavy. My bag has so many things, such as calculator, book, laptop, food and so on.
But, the reality is i have to go to Uni tomorrow. =.= Oh Lord~~