McSleazy started in 1999 as an outlet for some electro tunes GrantJRobson had made. BBC Scotland had an amazing show called 'Electronica' (don't look for it now, it's not there anymore) which aired these experiments, and McSleazy was go. Shortly after inception, Electronic Arts commissioned 8 tracks from McSleazy for their racing game 'Superbike 2000'. McSleazy, as a live band, played at many places including legendary club night Optimo, T in the Park and supporting Jimi Tenor.

As a DJ tool, McSleazy mixed up some tunes together "just to see the reactions on peoples faces", and he was on the mash-up path. "The Best Bootlegs In The World Ever" featured McSleazy's Song 2 v Don't Call Me Baby bootleg in '99, Radio 1 jumped on the bandwagon and the internet took care of the rest. A short while later, McSleazy founded Get Your Bootleg On (now GYBO5) which became - and remains - the online home of the mash-up.

MTV Mash followed, which featured dozens of McSleazy creations across it's three series and led to DJing trips across Europe, and to Bootie in San Francisco. The Franzie Boys ep, featuring four Franz Ferdinand v Beastie Boys tracks, immediately sold out it's initial run through HMV orders alone and received a thumbs up from both bands as well as a nod in Q magazine's top tracks of the year.

DJing stints included becoming a ten year resident of the NME Stage at T in the Park and touring with The Charlatans and Embrace as support. Mixing duties continued with the Popjustice album 100% Solid Pop, and an official remix of The Charlatans 'You Cross My Path'. McSleazy was given his own show on XFM and then went on to provide music for New Line Cinema's Antonio Banderas film Take the Lead. Mashups continued to dominate the landscape, and McSleazy worked on Activision / Freestyle Games' award winning DJ Hero, contributing music which formed part of the final product.

In 2010, Grant's musical output stretched beyond McSleazy. The first pieces of work credited to GrantJRobson began to emerge, in a very different vein to the earlier electro work. Early pieces such as Wilbur's Lullaby were warmly received, and had a more orchestal / soundtrack feel to them. This led to Grant being asked to provide the soundtrack to a promo film for fashion chain White Stuff.

After a trail through the hard drive, a seven track EP of instrumental McSleazy experiments called Pop Round My House was put online by McSleazy in April 2011. The intention was to air some unreleased material, and give bootleggers and pop-song writers something to play with.

The future aims to consist of writing more under the GrantJRobson banner, but that doesn't mean that McSleazy won't, at some point, generate a little bit more music.