Thread: Can someone tell me what "ё моё"

Originally Posted by Fluttershy

or is it just a phrase expressing surprise with no meaning?

Yes, it expresses a (usually unpleasant) surprise.

Originally, it was a euphemism of «ёб твою мать» (literally: “(I have) fucked your mother”) which can also express an unpleasant surprise but has even wider semantic field.

F-shy,
The possible meanings are 'f..cking hell' or 'bloody hell', 'damn', 'shite', etc. So it's rude.

But it is not мат.