A headbutt is a strike with the head, typically involving the use of robust parts of the cranium as areas of impact. Effective headbutting revolves around striking a sensitive area with a less sensitive area, such as striking the nose of an opponent with the forehead. It can be a risky but very effective maneuver: a misplaced headbutt can cause greater injury to the person delivering the headbutt than to the person receiving it.

From French botter = "to kick". Rams are well known for butting with their heads and horns. From this the terms battering ram and hydraulic ram are derived. Many males in various animal species employ butting during courtship.

In the UK, a headbutt is sometimes referred to as a Glasgow kiss. This is a tongue-in-cheek reference to the city of Glasgow's violent reputation.

Headbutts can be used from close range such as from the clinch, or on the ground. They are typically applied to the head of the opponent, since the head is often a readily available target and has several sensitive areas. An effective headbutt can be performed with a forward, rising, sideways or backwards motion; each being effective from different positions.

Jason "Jay Kay" Luís Cheetham (born 30 December 1969 in Stretford, Lancashire), is a Grammy Award-winning English musician, best known as the lead singer of the band Jamiroquai.

Born in Stretford, Greater Manchester, England, Kay formed Jamiroquai with members Toby Smith (keyboards), Stuart Zender (bass), Nick Van Gelder (drums) and Wallis Buchanan (didgeridoo) together with guest appearances by Gavin Dodds (guitar), Maurizio Ravelico (percussion) and Johnny Thirkell (horns) amongst others, both on the band's debut album and on their first tour.

Jamiroquai has sold over thirty million albums, and has spent a collective 162 weeks on the UK singles chart between 1992 and 2006 with Kay's personal wealth said to be around £40 million. He appeared on the Sunday Times Rich List 2004 at joint-950th. The Sunday Times Rich List 2008 has him tied for #1,794, with £40 million.

After the huge success of Jamiroquai's first single, When You Gonna Learn, a US$1.9 million, eight album deal was signed with Sony Music Entertainment. The band's first album was Emergency on Planet Earth. The relationship with Sony ended in 2007.

Brian Cushing (born January 24, 1987) is a professional American football inside linebacker for the Houston Texans of the National Football League. Cushing was selected in the 1st round (15th overall) of the 2009 NFL Draft by the Texans. He played college football at the University of Southern California.

Cushing is one of three children of Irish/Polish descent. His mother was born in Germany and his father was born in Bayonne, New Jersey. His brother Michael was a rugby player at Providence College, who earned 1st Team All American Honors. Cushing trained throughout his childhood in Park Ridge, New Jersey. Cushing attended Bergen Catholic High School in Oradell, New Jersey and went on to lead the Crusaders to the 2004 Group IV State Championship as a linebacker, tight end, and running back against Don Bosco Preparatory High School, providing huge plays in the 13-10 win. He was named "2004 North Jersey Player of the Year" by The Record (Bergen County). and played in the 2005 U.S. Army All-American Bowl alongside future USC teammates Patrick Turner, Rey Maualuga and Mark Sanchez.^{[citation needed]}

Sebastiaan "Bas" Rutten (Dutch pronunciation: [ˈbɑs ˈrʏtən]; born February 24, 1965) is a retired Dutch mixed martial artist, Karate and Taekwondo blackbelt, and kickboxer. He was a UFC Heavyweight Champion, a three time King of Pancrase world champion, and finished his career on a 22 fight unbeaten streak (21 wins, 1 draw). He is currently the star of Punk Payback on Fuel TV and co-host of Inside MMA on HDNet.

As a fighter, one of his favorite tactics was the liver shot (both punch and kick), and he popularized its use in MMA. Rutten is known for his charisma and has capitalized on his celebrity since retiring from fighting in 1999. He has worked as a color commentator in several MMA organizations, including Pride, and has appeared in numerous television shows, movies, and video games. He also coaches MMA and has authored several instructional materials.

Rutten was born in Tilburg, Netherlands and developed from the age of 6 a skin disease, named eczema, and severe asthma. Because of the skin disease he always had to wear long sleeves, turtle necks and gloves to protect him from showing his skin, his asthma made him very skinny and because of all this he was bullied on a daily basis as a kid. Rutten found refuge in climbing trees at a forrest behind his house, when bullies would chase him, he would climb in a tree and could swing from tree top to tree top, which made it impossible for bullies to follow pursued.