Hi,
I had a quick shower, but I could hear the girls outside giggling about something or other.
I had a quick shower, but I could hear the girls outside giggling about something.
Is there any difference between the two in terms of meaning?
'Something or other' is more casual. It also shows 'more attitude', in that it suggests that the speaker does not really care much about what this something actually is.
Best wishes, Clive