Hi Ghazal In isolation we use this phrase to invite/ask another person to do something and/or to take responsibility for doing something. For example: Person A: I have been trying to fix this computer for hours but I can't understand what is wrong! Person B: I know a bit about computers. Would you like me to try? Person A: Absolutely. Over to you. It can also form part of a longer sentence. And in this case it usually means the same as 'to you' - the word 'over' is sort of redundant. For example: Person A: Hi. Do you have the documents that you promised to send me? Person B; Oh sorry, I forgot to send them. I will send them over to you immediately. Hope this helps Chris

It means I'm giving you the floor to speak; it's your turn to speak.

Daniel are you thinking of the phrase 'It's over for you.' ?

means that it is over to you. In other words, it is finished. Ended.