Tasteless. More specifically, betraying signs of vulgar bourgeois aspirations to the tastes of the aristocracy.
This word was popularised (if not coined) by Vita Sackville-West, and became common currency amongst her set. Her husband Harold Nicholson and their friend James Lees-Milne use it frequently in their writings.
VSW might have said:
"Her garden is thoroughly bedint; it is full of pink and purple flowers"
We might now say:
"Her garden is thoroughly bedint; it is full of white flowers, a la Vita Sackville-West"