Pseud
/suːd/
Definition 1 of 1
Pro Tip 1/3Negative Connotation
The term 'pseud' often implies criticism or disapproval of the person being described. 
Don't be a pseud, just be yourself.
Pro Tip 2/3Informal Usage
'Pseud' is informal and primarily used in conversational or colloquial English, not in formal writing. 
At parties, there are always a few pseuds bragging about things they've never done.
Pro Tip 3/3Cultural Reference
In British culture, 'pseud' can describe someone pretending to have highbrow tastes to impress. 
He's such a pseud, always quoting obscure poetry.