The Pokies or โบนัสพิเศษ Pokie Machines are australian slang for slot machines.

American English - Slot Machines

British English - Fruit Machine

Canadian English - The Slots

Australian English - Poker Machine or "pokies"

All of the above are a casino gambling machine with three or more reels which spin when a button is pushed.

So Online Pokies are just online slot machines.