The phrase "a big sack of" is correct and usable in written English.
It can be used to describe a large quantity of something, often in a humorous or exaggerated context.
Example: "After the party, we ended up with a big sack of leftover food that we didn't know what to do with."
Alternatives: "a large bag of" or "a hefty amount of".
The objective is to show off a big sack of money in a required July campaign finance report.
"I sent my designs via fax to every fashion company's production department, then I'd set up an appointment with them and bring a big sack of work samples".
For all her quirkiness and play, Barker is dragging around a big sack of mouldy old ideas here that made me feel less born again than bored again.
It is very wealthy, having inherited most of the Communist Party's vast property holdings, including farms, hospitals, aeroplanes, mansions and so forth, which provides it with a big sack of carrots.
My store-cupboard essentials... T: A big sack of good stone-ground flour, a sack of oats for porridge, and Vitam – it's the German version of Marmite and it's slightly easier to take in the morning.
If I were to dare to dream and get ideas above my station, I might hope that one day we could replace our customary bag of own-brand crisps with a big sack of Kettle Chips.
But when Mr. Bertoldi showed up again with a big sack, filled with packets of the stones, Mr. Pont panicked.
I dressed up in the costume and the wife took a Polaroid photo of me from behind with a big sack, next to their presents.
"If Iran didn't exist, neither would I," says Zalmai, dropping a big sack.
An offload involves transferring spending from a general fund, the big sack of money that the state is supposed to use to cover its commitments, to other funds.
He laughs, claiming he has to find some way to spend the big sack of cash he carries around and I, to my horror, catch myself glancing under the table.
