pseudo
pseu-do
noun
An insincere or pretentious person, often claiming knowledge they do not possess.
"He's just a pseudo, ignore him."
adjective
Not genuine or real; falsely appearing to be something authentic or true.
"The article was full of pseudo-scientific claims."
Thesaurus
Synonyms: imitative, counterfeit, sham, role player, impostor, pretender, shammer, pseud, fraud, imposter, fake, faker