'Revert back to you' implies giving you an answer and passing control back to you. For instance you could send me something to proof, now I am in control. When

'Revert back to you' implies giving you an answer and passing control back to you. For instance you could send me something to proof, now I am in control. When I am finished, and if you have subsequent work to do, control may revert to you. If people say this when they appear to mean 'answer' then they are just communicating badly, not using jargon. Stop them and ask them to explain what is being reverted. If you see it in written form then suggest a correction. If the senior people pick up on this stuff it is possible to stop it quickly.