Implying the false display intelligence, this is a term correctly applied to people who lie about their own intellectual background, claim to have studied matters they haven't, to have read books they haven't, et cetera.
A great majority of Internet users, however, are fond of using the term incorrectly to, often anti-intellectually, refer to those whose phraseology annoys them.
'Dude! Dude hey!'
'What is it, Dan?'
'Dude, that guy said a weird word. He is such a pseudo-intellectual.'
'You're a fucking idiot, Dan.'
122👍 105👎