What's the origin of this idom? That's (Those are) the breaks / That's the way the cookie crumbles.. I guess these two idoms have the same meaning and interchangeable. But by any chance, do you know the origins of them and how they started to be used?, Thank you...

Cut me some slack! / Give me a break! I have a question about the phrase below.. Mom: Hey,son.why haven't you swept the floors or dusted like i asked you to? Son: Mom, just cut me some slack!. I have been studying for weeks and i don't still understand all the material.I'm so stressed. I'll do it later,please.. In the above dialogue, the phrase "cut me some slack", Would it be okay to replace it with this phrase "give me a break". I'm not sure if i understand correctly but i think those two phrases have the similar meaning like "don't give me a hard time or treat me in a harsh way".. Please,leave some comment... Thank you very much..

The difference? Hi.. I'd like to the difference between these two sentences. What can parents do when their kids start acting out? What can parents do when their kids start acting up? Thank you very much...

The difference? Quality / Characteristic / Attribute / When it comes to refering to a person,what's the difference between them? Thank you...

Up for / Want to.... I'm up for some Chinese food / I want to have some Chinese food.. We're going out dancing tonight.Are you up for it? / We're going out dancing tognight. Do you want to join us? What's the difference between those sentences?..What kind of feeling or nuance do you get when you speak each sentence?..My guess is that they have pretty much the same meaning but the word " up for" is stronger than the word " want to" when it comes to nuance .Am i right?.If not,correct me,please.. Thank you.