Two-fer (noun)

1. A deal or offer in which two items are sold for the price of one.
2. A performance or presentation of two pieces of entertainment for the price of one.

Origin:

This term is believed to have originated in the united states in the mid-20th century.

Examples:

1. This restaurant is offering a two-fer special on pizza and beer on Mondays.
2. The comedy club is having a two-fer show featuring two comedians for the price of one ticket.
3. The clothing store is offering a two-fer on shirts, buy one get one free.
4. The music concert was a two-fer, with two bands performing back to back.
5. The airline is offering a two-fer deal on flights to Europe, two tickets for the price of one.