“Begging the question.” The phrase used to have a specific philosophical meaning. Now it simply means “raising the question.”
The meaning of “Occam’s razor” is similarly expanding unchecked from its original meaning.
And then there’s “logical fallacy.” Some people use it to mean anything that’s not true.
Indeed, the word “philosophy” itself. It used to mean the discipline that is concerned with areas like logic, ethics, etc. Now it has come to mean any attitude that a person lives by.