A waste of energy phrase
If something is a waste of energy, it does not produce the result you want or it is unnecessary.
Only when I finished my essay did I realized that I had strayed from the main topic. It was such a waste of energy.
I find mental calculation is a waste of energy when we have already had the calculator.
Investing in that project will be a waste of energy. I think it has no chance of success.
To attempt to do something but produce no result or effect
No value, use, or purpose
Not be useful or suitable to anyone or anything
To undertake something that appears to be useless
To try a impossible, often ridiculous task
This phrase is formed based on the meaning of the noun "waste" and "energy".
To be very wet
Because of forgetting bringing an umbrella, I look like a drowned rat when it rains.