The Full Form of LYF is‍ life.

Life is a characteristic that distinguishes physical entities that have biological processes, such as signaling and self-sustaining processes, from those that do not, either because such functions have ceased (they have died), or because they never had such functions and are classified as inanimate. Various forms of life exist, such as plants, animals, fungi, protists, archaea, and bacteria. Biology is the science concerned with the study of life.

There is currently no consensus regarding the definition of life. One popular definition is that organisms are open systems that maintain homeostasis, are composed of cells, have a life cycle, undergo metabolism, can grow, adapt to their environment, respond to stimuli, reproduce and evolve. Other definitions sometimes include non-cellular life forms such as viruses and viroids.

Life is a 1999 American buddy comedy-drama film written by Robert Ramsey and Matthew Stone and directed by Ted Demme. The film stars Eddie Murphy and Martin Lawrence. It is the second film that Eddie Murphy and Martin Lawrence have worked on, the first being Boomerang. The supporting cast includes Ned Beatty, R. Lee Ermey, Obba Babatundé, Bernie Mac, Anthony Anderson, Miguel A. Núñez Jr., Bokeem Woodbine, Guy Torry, Michael Taliferro and Barry Shabaka Henley. The film’s format is a story being told by an elderly inmate about two of his friends, Ray (Murphy) and Claude (Lawrence), who are both wrongfully convicted of murder and sentenced to life in prison. It received an Oscar nomination for Best Makeup at the 72nd Academy Awards.