Secret languages

Polari was a a small number of dialect words mostly concerning illegal sex, either gay or sex work. It appeared to come from Mediterranean seaports, but was also used for Punch and Judy in fairgrounds.

The grass-mud-horse was a Chinese internet campaign in 2009 using an Alpaca image.

Doge illustrates the move to virtual reality and how an internet meme propagates and can become as credible as a major currency.