Posh

Look it up at Wiktionary.

According to Donna Noble, loo was a posh word for toilet. (TV: The Unicorn and the Wasp)

The Tenth Doctor told Donna that the Shadow Proclamation was a posh name for police. (TV: The Stolen Earth)

Yasmin Khan likened the Tsuranga's ocular recorders to a "posh version" of her uniform camera. (TV: The Tsuranga Conundrum)

Ram Singh called a fellow Coal Hill Academy student a posho. (TV: For Tonight We Might Die)