Misused Phrases in English

Think of phrases in your language that people use incorrectly. These "incorrect" uses often become common. Does this reflect a loss or language skills in contemporary life?

Here are some of my favorite English examples:

"That's okay."

When should you use, "That's okay"?

Example: "Hey, I borrowed your CD without asking. I'm sorry."
"That's okay. Don't worry about it."

How is it commonly misused?

Kids misuse "That's okay" in a very cute way.
"Son, make sure to finish eating your vegetables."
"No, that's okay. I don't want them."
--This "that's okay" makes no sense. It's not okay for the child to refuse the order to eat all of his vegetables, but it is kind of cute how they try to refuse to do something in a polite way.

"Don't Worry About It"

Example: Same as above. It's a way to say, "It's not important," and "I accept your apology."
"Hey, I broke your cup. I'm sorry." "Don't worry about it. I have plenty of cups."

How is it commonly misused?

Yesterday:
"Hey, I hear you are moving out of your apartment. Can my friend live in your room for a month?"
"Okay. She can pay the rent for a month and I will look for a new tenant for the next month as a favor to your friend."

Today:
"Hey, my friend says, 'Don't worry about it' about living here. She wants a place with air conditioning."

--As you see above, "Don't worry about it" is a way to forgive someone who has apologized. This common misuse is very annoying because the person is making you feel like you are inconveniencing them by offering to help them. It seems they are refusing to thank you because they don't need or want your help after all. Of course, you should say something like, "Hey, thank you for offering to let me stay here, but I think I should live somewhere else." "Don't worry about it" is rude here because now I have to worry about finding a new tenant to replace me: I thought I had already found someone to take my room, but now I don't have anyone.


So, what phrases in your language are commonly misused? How are they misused? Why do you think they are misused?