"You miss every shot you don't take!" or similar. It's useless, makes no sense, and is disrespectful to yourself and others.

Which is why I love saying it to pricks at work.

"it is what it is"

If it weren't what it is, well, it wouldn't be anything at all, would it?

"its all about calories in, calories out".

"which begs the question ..."

I hate this phrase a lot. First, it comes from the term 'begging the question' which is a stupid name for a particular type of logical fallacy that doesn't even make sense for its intended meaning. But no one uses in the intended way anyway. They use it to mean "raises the question" or "prompts the question".

As in: John hasn't been to work for a couple days, which begs the question 'is he sick?'". No it doesn't beg the question, it raises it. You beg for something, so you can beg a person for money or beg a dog to stop barking, etc. but you can't beg a question for anything.

So it's a doubly stupid phrase that makes me cringe every time I hear it whether it's used "correctly" or not.

"A bird in the hand is worth two in the bush."

Who wants two birds in their bush? I don't even want one bird in my bush; they might peck at my worm!