A promiscuous person who has many sexual partners. Refers to a pass (most commonly used on commuter trains, subways and amusement parks) with ovals printed on it that indicate the number of times it can be used before a new ticket needs to be bought. Every time it is used, the ticket taker uses a paper punch to cut a hole in the ticket. Indicates that the person is like the paper ticket: cheap, good for a ride, used in all holes, considered disposable by the user, and discarded after it's all used up and worthless.
1) "Lyle is here? That punchcard better stay away from my boyfriend!"
2) Everyone at the party slept with Joan, giving her the unenviable reputation of being a punchcard.