convert oxygen into carbon dioxide

[halmom]

I found the expression' All I did was converting oxygeon into carbon dioxide' and it means really boring. Is it common or naturay way to say instead of saying that boring?

How was your weened/vaction/class?

Boring. All I did was converting oxyteon into carbon dioxide.

 

[owlman5]

Is it common or naturay way to say instead of saying that boring?

No. It's an unusual, funny way to say that all you did was breathe.

Where did you find the expression, halmom? What were people talking about when the speaker made this comment?

 

[Parla]

I found the expression "all I did was convert oxygen into carbon dioxide"; it means "it was really boring". Is it a common or natural way to say that instead of saying "it was boring"?

"How was your weekend/vacation/class?"
"Boring. All I did was convert oxygen into carbon dioxide."

No, it's neither common nor natural. Most average people wouldn't find it amusing, either, because they wouldn't understand what you meant. I don't suggest that you use it.