Penal labour is a form of unfree labour in which prisoners perform work, typically manual labour. The work may be light or hard, depending on the context. Forms of sentence which involve penal labour include penal servitude and imprisonment with hard labour. The term may refer to several related situations: labour as a form of punishment, the prison system used as a means to secure labour, and labour as a form of occupation of convicts. These situations can be applied to those imprisoned for political, religious, war, or other reasons as well as to criminal convicts. Large-scale implementations of penal labour include labour camps, prison farms, and penal colonies.

Punitive labour, also known as convict, prison, or hard labour, is a form of unfree labour used in both past and present as an additional form of punishment beyond imprisonment alone. Punitive labour occupies a spectrum between two types: productive labour, such as industrial work; and intrinsically pointless tasks used as primitive occupational therapy and/or physical torment. Sometimes authorities turn prison labour into an industry, as on a prison farm. In such cases, the pursuit of income from their productive labour may even overtake the preoccupation with punishment and/or reeducation as such of the prisoners, who are then at risk of being exploited as slave-like cheap labour (profit may be minor after expenses, e.g. on security). On the other hand, in Victorian prisons, inmates commonly were made to work the treadmill: in some cases, this was productive labour to grind grain; in others, it served no purpose. Similar punishments included the crank machine (a device where prisoner had to turn a crank that merely pushed paddles through sand in a drum), and shot drill, carrying cannonballs around for no purpose. Semi-punitive labour also included oakum-picking: teasing apart old tarry rope to make caulking material for sailing vessels.

Antron Singleton (born September 15, 1976), better known by his stage name Big Lurch, is an American rapper. He is serving a life sentence for murdering 21-year-old female roommate Tynisha Ysais and eating parts of her body while under the influence of PCP in April 2002.

During his music career, Singleton worked with such Bay Area rappers as Luni Coleone, Too Short, Mac Dre, RBL Posse, C-Bo, E-40, Keak Da Sneak, Yukmouth, E-A-Ski and New Orleans-based rapper Mystikal, TQ, DJ U-Neek, Texas' Lil Keke, and Big Bone. He was also a member of the group Cosmic Slop Shop along with fellow members Doonie Baby and Rick Rock.

Born in Dallas, Texas, Singleton grew up nearby in North Dallas, Texas. At 7 years old, he began writing poetry. He decided to pursue a career in rapping, and began performing in 1990. In his early rap years, Singleton rapped under the name G-Spade, but later changed his name to Big Lurch after earning that nickname from his peers. This was due to his intimidating size of 6 foot 6 inches.