The word cheap is a term used very frequently in Brazil, especially in the gaming community and among gamers, to refer to a virtual money machine. However, the word may have meant more than that. And, despite common usage, it is not correct to use the word slot as an alternative or substitute for cockroach. Therefore, the most correct word would be machine or hatchet, depending on the interpretation.
In the gaming context, the expression free spins is often used to describe an additional benefit granted by a slot machine (or any other machine) during game rounds. When a player wins some money using these machines, they can get a number of free rewards (usually in the form of additional credits), which are then used to continue playing.
However, the real question here is what real money exactly means. This may vary depending on local laws and types of machines. In Brazil, for example, real money can only be considered real money when the player uses the money he received through certain free rewards, such as extra profit, to buy additional credits on the machine.
Therefore, even though it is common to say Slot Machines as a simple term to refer to the machine, the most accurate translation would be Máquinas de Baratas, which is more suitable for the expression free spins. Furthermore, real money is actually being used in a more specific sense - in relation to the money that the player has available to spend on the machine.