Kissy Sell Out (born Thomas Bisdee on 18 June 1984 in Huntingdon, Cambridgeshire, England) is a British/Canadian DJ,producer, graphic designer, label manager of San City High Records and Stepper Man, part-time astrophysicist and science columnist for Sick Chirpse. Kissy Sell Out gained notability in 2006 for his electro music productions and energetic DJ style. In 2009 Mixmag described him as "one of the most exciting, charismatic and entertaining DJs of the decade".

In addition to his DJ work, he has released six albums – Youth, Wild Romance,Introducing Kissy Sell Out, San City High All Stars Vol. 1 & 2, Style From The Westside – and composed official music for the 2012 Olympics ceremonies held in London

From 2007–2012 he hosted a successful BBC Radio 1 show called the Kissy Klub. The show blended classical music, and computer-voiced fictional characters with an exclusive selection of remixes created specifically for the show called "Kissy Klub Versions".

 With this radio show Kissy became an influential force in the developing electro scene. Notable artists such as Diplo, Felix Da Housecat, Hervé, Uffie & Erol Alkan made regular appearances alongside exclusive tracks Kissy supported which kick-started careers for a long list of breakthrough producers and DJs across the globe.

Until 2009, the majority of his musical output as a producer was in remixes for other artists such as Mark Ronson, Calvin Harris, The Human League, Sugababes, Groove Armada and All Saints. It was this early production work that caught the attention of executives at BBC Radio 1.

In July 2007 Kissy Sell Out was signed by BBC Radio 1 to present a monthly instalment of a specialist dance music show called In New DJs We Trust. In October 2008 he permanently took over Eddie Halliwell's Thursday night slot to host his own weekly show called the Kissy Klub. His radio show covered a selection of musical styles and genres with the tracks often seamlessly mixed together. His last show with BBC Radio 1 was in 2012.

In 2019, a new podcast called "Long Live The Kissy Klub" was started to make the Kissy Klub DJ mixes and remixes available to fans of the original show, in high quality re-mastered audio format, for the first time since the show's end.