Early days An attendee of Stocksbridge High School, Nicholson was the only member of the
Arctic Monkeys to not live in the
High Green district, residing in nearby
Hillsborough. Nicholson played bass guitar, and was seen as "the band wit, reliably swift with a self-deprecating quip". However, on 20 June 2006, it was announced that he was no longer part of the band, with
Alex Turner later stating "we sorta found ourselves in a situation where we wanted to move forward". The band asked Nicholson to leave. Drummer Matt Helders later remarked: "It's not for everyone, the travelling, I suppose ... He didn't get specific. We didn't want to drag all of that out of him ... We took [Nick] out to America and we just couldn't see going back to the way things were for whatever reason." It was not until 2019 that Nicholson himself opened up on his departure. In an interview with podcast The Michael Anthony Show, Nicholson told the host that leaving the band that he co-founded was "soul destroying". The bassist added that news of his imminent departure came as a huge shock and was far from mutual. Nicholson went on to detail the meeting that ended his time in the band and also painted a vivid picture of life in the years that followed, which included struggles with mental health as well as a new search for identity. Despite this, Nicholson did state that he has since been on good terms with his former bandmates, with them often meeting up whenever they return to Sheffield.
Post-Arctic Monkeys Initially, Nicholson began making a name for himself in Sheffield as a DJ, mainly as a resident at Threads, but also performing at
Reverend Soundsystem (under the name AndyGun). He also remixed a
Reverend and the Makers song "You Get So Alone Sometimes it Just Makes Sense". In November 2007 he made his DJ debut in London at a club event called Threads vs Filthy Few. In 2008, Nicholson formed
Mongrel, which consisted of himself,
Jon McClure of Reverend and the Makers,
Babyshambles bassist
Drew McConnell and
Matt Helders from
Arctic Monkeys, as well as London rapper
Lowkey from the Poisonous Poets. They released their lone album,
Better Than Heavy on 7 March 2009. He was also in the band Lords of Flatbush, with Sheffield-based singer
Steve Edwards and Louis Carnall formerly of
Milburn, but left to concentrate on Mongrel. The position was handed over to his brother Rob Nicholson of Sheffield band Dead World Leaders. In August 2009, Nicholson joined ex-Milburn frontman Joe Carnall's band The Book Club, but left later that year when, on 23 December
Jon McClure announced via his Twitter account and official website that Nicholson would be made an official member of Reverend and the Makers (having made occasional live appearances with them prior to this). He remained in the group until their 2010 hiatus but when they reformed in January 2012 Nicholson was replaced by his friend and former bandmate in The Book Club, Joe Carnall. Nicholson is currently producing and performing in hip-hop group Clubs & Spades with Maticmouth from Reverend Soundsystem. They made their live debut at The Plug on Saturday 20 July 2013 as part of
Tramlines Festival and their debut album
Stand Up was released on Monday 22 July 2013. He is also part of production duo Sticky Blood with Jamie Shield. As of 2019, Nicholson has been writing, recording and producing music under the name Goldteeth. In 2024, he played bass for
hip-hop group
Kneecap on the track "Better Way To Live", from their album
Fine Art, alongside members of
rock band
Fontaines D.C. and
producer Toddla T. In late 2025, Nicholson announced he was releasing a
photo book I Bet This Looks Good on Your Coffee Table referencing the
Arctic Monkeys song "
I Bet You Look Good on the Dancefloor". The book contains photos of the band taken by Nicholson between 2005 and 2007. ==Political views==