1. A manual transmission with four speeds that is located on the floor of an automobile beside the driver. I don't know if I'll be able to pass my driving test; I had to learn on my dad's old 4-on-the-floor.
2. A musical rhythm characterized by steady and uniformly accented beats in 4/4 time, typically referring to electronic music. I'm not a huge fan of that club, they only play 4-on-the-floor tunes.