I think the day a language ceases to have wacky usage is the day it starts to be a dead language

Expressions corrupt language, but languages are organic in nature and always changing. Are you comfortable with Shakespearean English? I’m not. We wouldn’t be able to understand English if we were alive 200 years in the future.

Language belongs to the people who speak it. Not pseudo-academics who live in plastic-ivory towers.

Since your question is posed in English, the bastard lingua franca of the world, I would have to say that the English language is a corruption of many languages including itself. English adopts/steals words and expressions from all other languages as it sees fit and is in a constant state of change, that's why Shakespeare would have a very hard time understanding anything by Andrew Lloyd Webber if he should somehow be transported into our present era.
Words like Kamikaze, Aloha, Weiner, Vino, Tsunami, Wallaby, Skol, Poutine, Amigo, Geshundeit, etc. etc. are readily recognized by English speakers as English words even though they originated in other languages. Little wonder that English is one of the hardest languages to master, everything about it is butchered, from the words themselves and their spelling (there, their, they're or your, you're and yore- don't worry just memorizes them) to how the sentences are structured. It's a bitch of a language although tonal Mandarin is supposed to be a bit harder to master, that's what my oldest son says and he's a translator for businesses in China.

As long as we're communicating and exchanging ideas, who cares?

Language is a virus from outer space.
And hearing your name is better than seeing your face. -Laurie Anderson coopting willims S Burroughs

I am sure you speak more languages than most of us on this site, but you need to make sure that what you are saying in any language is clear to your listeners. Language and expressions both evolve and change. Idiomatic expressions perhaps lose their currency faster than basic language, but English is a particularly flexible and interesting language.

Both, Social media is to blame for this ? How do you show expressions in words. Kids are turning into Zombies.