The phrase "completely upset" is grammatically correct and can be used in written English.
It is typically used to describe someone who is extremely distraught or emotionally disturbed. Example: After receiving the news of her father's death, Jane was completely upset and couldn't stop crying.
"It can completely upset the normal, everyday life of India".
Her life was completely upset by this affair and she was depressed for a long time".
Although Britons appear to be slightly less loyal to the main Facebook site, the company may not be completely upset with the survey findings.
If pike have spread to the loch they will eventually dominate the jungle and completely upset the balance, including taking the young of the birds that were the reason for my visit.
Watch for the latter group to go around mumbling for the next few weeks about how Caffeine has completely upset their rankings and careful work - even while Google protests that it's changed nothing at all.
If one knew all the facts relating to a given inquiry except two or three, one might reasonably suppose that one was near a limit of exactness in one's knowledge ; but seeing that in our investigation of Nature we only know two or three, so to speak, out of a million, it is obvious that at any moment the fresh law arising from increased experience may completely upset our former calculations.
This sudden shift completely upsets the harmonic structure and gives unmistakable notice that a long, complex movement will be necessary to right the imbalance.
Unless Hindenburg assumes dictatorial measures, or some unexpected development completely upsets all present calculations, Hitler's party will organise the Reichstag and dominate the government.
"There are so many new heroes and heroines, how they are all going to be recognised without completely upsetting the system is going to be a challenge," he told The Mail on Sunday.
"It's just amazing that you have all these appeals, the appellate courts, all these different very sophisticated judges, and then, you know, a judge in a sleepy little town way upstate in Connecticut completely upsets the apple cart," he said.
I don't know about Endless West completely upsetting the apple cart, but what I do know is that almost every whisky-producing country has ventures that are producing whiskey worth trying, selling and appreciating.
