The term 'casino machine' can refer to three different types of machines. The first is a SLOT machine, which is a gambling machine with three or more reels that spin when a button is pushed. The second is an ATM, which stands for Automated Teller Machine and is used to withdraw money from a bank account. The third is a penny SLOT, which is a type of SLOT machine that allows players to bet as little as one penny per spin.