Is 'trump end of story' a common expression?

No. 'End of story' is a common expression, but 'wuando' is not a known part of common English expressions. So 'wuando end of story' is not a common expression.

No, it's not really a common expression as it's self - contradictory. But it can be used creatively in certain contexts.

It's not a very common expression. Usually, people might just say 'you lost' or something more elaborate depending on the context. 'End of story' added to it makes it seem more final and a bit cold. In normal conversations, especially in more polite or diplomatic settings, such an expression is rarely used. However, in some very competitive or informal situations among friends who are used to teasing each other, it might pop up from time to time.

No, it's not a common expression. Usually, we would say something like 'You are my son, and that's it' or 'You are my son, end of story' in a more standard way.

Yes, it is. Idiomatic expressions are phrases that have a meaning different from the literal meaning of the words. 'End of the story' is used to signify the end or conclusion of a matter, not just the end of a literal story.

I don't think it's common. Usually, we use more straightforward phrases like 'we live with each other' or 'we are in each other's lives'. This statement is a bit of an odd construction and not something you'd hear often in everyday conversation.

It is a common expression indeed. You can use it whenever you want to draw a line under a matter. In a family discussion about where to go on vacation, if the parents say 'it's end of story, we're going here', it's a way of shutting down any further discussion. It can also be used in academic settings. For example, when a research project has reached its final stage and no more changes are possible, a researcher might say 'it's end of story'.

It's hard to predict exactly. So many factors could influence the outcome.

It's hard to predict exactly how it ends. Politics is full of surprises and can change in unexpected ways.

It could imply that Trump is the final or conclusive factor in a situation. For example, in a political discussion about a certain policy change, if someone says 'trump end of story', they might be suggesting that Trump's stance or action on it is the ultimate determinant, without any further debate.