A pakapoo ticket is bought which contains rows of characters from the Thousand Character Classic (an ancient poem in which no two words are repeated). The master ticket is kept hidden and is marked by the organiser of the game. The player marks a number of characters on their ticket. The ticket closest to the master ticket wins.
In Australian slang, "it looks like a Pakapoo ticket" is a reference to any writing that is messy or scrawled.