1. Condom: This is the most common slang meaning of "rubber."
2. Tires: It can also refer to car tires, especially in the context of "burn rubber" meaning to accelerate quickly, causing the tires to skid.
3. Fake: This usage is less common, but sometimes "rubber" can mean something that's fake or not genuine.
Examples:
* "He used a rubber." This clearly means he used a condom.
* "He burned rubber out of the parking lot." This means he drove away quickly, making the tires skid.
* "That's just a rubber check, don't spend it." This means the check is likely fake and not worth spending.
It's important to consider the context to understand the intended meaning of "rubber" in slang.