The phrase "a bunch of extra" is correct and usable in written English.
It can be used to refer to an excessive or additional amount of something, often in a casual or informal context.
Example: "I found a bunch of extra supplies in the storage room that we can use for the project."
Alternatives: "a lot of extra" or "a heap of extra".
Policing the Police A BUNCH OF EXTRA MONEY HAS BEEN ALLOCATED TO INSPECT CRIME FIGURES £9.4 million more will be spent after senior police officers admitted statistics are routinely fiddled.
This allows users to dispense with the factory and a bunch of extra class types.
If my business had extra cash on hand, and the engineer had a bunch of extra time available, then I would feel much more comfortable about starting training.
Anticipating his boss's every need, Mr. Lesser keeps "a bunch of extra spectacles of his in my desk because he's constantly losing them".
Quite ready, I might add, to do something wild, like grab a bunch of extra napkins when I scarf down lunch at McDonald's after my riffs.
The exam covers the topics up through and including mathematical induction, and focuses on the topics from PS3 - PS5. We've posted a bunch of extra practice problems along with three practice midterms.
AAB and a high-ish 2.1 from a Russell Group university, augmented by a bunch of extra-curricular achievements, is usually enough.
But Percy has been kidnapped, along with many other townspeople, by a bunch of extra-terrestrial varmints with slurpy tentacles and fancy bleeping spaceships.
A bustling green cart at East 167th and Gerard Avenue in the western Bronx looked more like a dollar store this week, with offerings like a bag of five tomatoes and a bunch of extra-large carrots.
A bunch of extras lined up at sunrise for haircuts.
Similarly, the big crowd scenes, with hundreds of performers trying to simulate the bustle of a Jerusalem market, initially have a strong impact, but after a while you realise you're just watching a bunch of extras trying to create visual interest.
