An English YouTube teacher is annoyed at some common mistakes his countrymen make. At ~2:20 in this video he says:
Would of, could of, and should of.
These aren't things. Stop.
Why? Is this an idiom, or do I just not understand well?
The presenter is criticizing some bad habits in English usage and pronunciation. After more listening I found out that the meaning of the phrase in question might be this: "These expressions as they are have no meaning, they are incorrect and should not be used." Could this be the meaning of what I was asking about?