Monopolising conversations with stuff that you think is clever, only to make yourself look more of a fool than sophisticate.
at first sight he looked quite the man about town, but his constant twatulence (or twatulent conversation), revealed a far less cultured man.
The man's actions could be described as nothing more than absolutely twatulent in it's idiocy!
I swear that Doris kept pumping out her front bum. She must have twatulance!