“It's such a waste of time.”
You're talking to a friend about Facebook. You are trying not to use it. This is how you explain why.
It's such a waste of time.
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When something is "a waste of time", it means that you spend a lot of time doing it, but don't get any benefits from it in the end. This is a common phrase people use when they're talking about:
- things that they have to do but don't want to do (like waiting in a line)
- things that they want to do but don't think are useful (like playing video games or using some websites)
The word "such" is similar to "so" except it's used with nouns instead of adjectives:
He's so handsome.
He's such a good-looking man.
I used to be so lazy.