This phrase means when you don't have anything to say. For example, when someone is dumbfounded, they get confused and don't talk. Someone might ask them, "Cat got your tongue?"
smth like that idk good luck man
Use of everyday language but with different meanings shows up most frequently in slang speech.
This would be known to be slang because yes its every day, but its not proper English and there's also different meanings.
Your answer: Slang
What quotes there is nothing there except the question