Lethal is an adjective meaning capable of causing death. In practice, it is commonly used when implying or referring to something that is particularly highly likely to cause death.

Lethal may also refer to:

Lethal Bizzle, also known as Lethal Big Lips. (born Maxwell Ansah, 14 September 1984 in Walthamstow, London, England), is a Ghanaian British rapper. His songs are known to satirise modern gangsta rap; much of the humour comes from the adoption of hip-hop style and language. In December 2004, he released the single "Pow (Forward)", also known as "Forward Riddim" which was banned from airplay by some mainstream radio stations.^{[citation needed]} It entered the UK Singles Chart at number 11 in its first week on the chart in 2005, and it reached number one on the UK Dance Chart. He won a MOBO for "Pow (Forward)" as 'Best Single', and was nominated at the same awards as 'Best Newcomer'.

Earlier he was a part of the group More Fire Crew. In 2002, their track "Oi!" reached the Top 10 of the UK Singles Chart. In early July 2005, Lethal Bizzle appeared on stage at the final Live 8 concert in Edinburgh and was a part of the NME Rock N Roll Riot Tour in 2007.

He was number five in the NME Cool list 2007/2008 beating Amy Winehouse, Pete Doherty and Alex Turner.

Mac Lethal (born David McCleary Sheldon) is a rapper from Kansas City, Missouri, of Irish descent.

Mac Lethal was born David McCleary Sheldon on July 25, 1981.^{[citation needed]}

In 1998, he won several rap battles against local emcees from rival Kansas City high schools, and began to generate a buzz amongst the very small, tightly knit Kansas City underground hip-hop community. Mac entered the emcee battle at Scribble Jam hip-hop festival in August 2001 and took second place in the finals. He returned in 2002 and won the competition, and took second place in 2004. Sage Francis would later take Mac on the F*ck Clear Channel Tour in 2004.^{[citation needed]}

In 2006, Sheldon founded Black Clover Records with longtime friend Jeremy Willis.^{[citation needed]} Mac Lethal hosts Black Clover Radio Hour on the Kansas City alternative station 96.5 The Buzz. It has aired every Sunday night since 2006.^{[citation needed]}

In December 2011, Sheldon released a video on YouTube of him rapping over the beat to "Look At Me Now" while he prepares a dish of pancakes in his kitchen. The video became a viral hit and got millions of views in a matter of days and led to interviews on websites like CNN and the Washington Post.

Lethal injection is the practice of injecting a person with a fatal dose of drugs (typically a barbiturate, paralytic, and potassium solution) for the express purpose of causing the immediate death of the subject. The main application for this procedure is capital punishment, but the term may also be applied in a broad sense to euthanasia and suicide. It kills the person by first putting the person to sleep, and then stopping the breathing and heart in that order.

Lethal injection gained popularity in the twentieth century as a form of execution intended to supplant other methods, notably electrocution, hanging, firing squad, gas chamber, and beheading, that were considered to be more painful. It is now the most common form of execution in the United States of America.

The concept of lethal injection as a means of putting someone to death was first proposed on January 17, 1888, by Julius Mount Bleyer, a New York doctor who praised it as being cheaper than hanging. Bleyer's idea, however, was never used. The British Royal Commission on Capital Punishment (1949–53) also considered lethal injection, but eventually rejected it after pressure from the British Medical Association (BMA).