Slang: I don’t really think much about it. These days, so much slang I grew up with is now commonplace. Dude, ain’t it for real.
I can tell you which slang words I do not like though. One of my biggest pet peeves is reading the word “FAIL” as a noun: “That is a total fail.” Or “They have major FAIL written all over their sign!”
It sounds so wrong. It grates my nerves especially when I read the word in a respected media outlet. I once had a debate with a friend about why or why not the usage should be considered “correct English” since so many people use it. “But I don’t like it!” I remember telling her. “But, if so many people use it, shouldn’t it be correct?”
Sigh. I give up.
I also feel irritated when I see people use the word “bestie”. It has the same number of syllables as “best friend”! Why use such an unnecessary shorthand.
Sigh. But of course, since these have become so commonplace, shouldn’t they be accepted then?