A philosopher is a person who talks about everyday subjects using forms of language which are unintelligible to the average person. If the philosopher can quote other philosophers, preferably long dead ones, who also used impenetrable language - preferably a foreign one, then he will be even more greatly esteemed.
Some have said that philosophy is just the process of adding footnotes to Plato, others that Immanuel Kant summed up the entire field in his surname.
Anyone talking in a fashion which "the man in the street" can understand is obviously not a philosopher by definition - he is merely popularising his point of view.
Immanuel Kant was a real pissant
Heidegger, Heidegger was a boozy beggar
David Hume could out-consume
And Wittgenstein was a beery swine
John Stuart Mill, of his own free will,
Plato, they say, could stick it away --
And René Descartes was a drunken fart.
Yes, Socrates, himself, is particularly missed,
|—Eric Idle, Monty Python's Flying Circus, The Second Season (Recorded 25 September 1970, aired 24 November 1970)|