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I am a face without a mouth or eyes

Don't roll but on the flip I tries

To see the up me not the down,

And split your me there goes the frown,

What's not a main, but still professed

Such as my interest.

'I don't think there's anything scarier than a face without a mouth or eyes.'
'What about a face without a nose also?
...
Or a bowl without milk?'

Riddle Answer A Side

Riddle Explanation
I am a face without a mouth or eyes - in geometry another term for face.

don't roll but on the flip I - on the flip side.

I tries to see the up me not the down - the upside, and the downside, of something.

and split your me there goes the frown - to split someone's sides, to make someone laugh vigorously.

what's not a main, but still professed such as my interest - something that's minor or incidental, such as a side interest.