Jayden O'Neill-Crichlow (born 24 April 2002), also known as SJ or Slim Jim, is a UK Drill artist from Tottenham, N17. He is a member of the North London collective, OFB.

SJ and fellow Y.OFB members, Bandokay and Double Lz, burst onto the scene in late 2018 with their debut track ‘Bad B On The Nizz’ which currently has 1.6 million views.

Their reputation only began to grow following this as they released numerous hits such as ‘Reality’, ‘Purge’ and ‘Ambush’. They also featured in a memorable ‘Next Up?’ freestyle which currently has 3.5 million views.

On June 2, 2019, SJ released his debut solo track called ‘Youngest In Charge’, this has proven to be a huge hit and has surpassed the 10 million view mark.

On May 16, 2019, SJ was arrested and charged with the murder of a 20-year-old man. SJ was then found guilty of the murder in December, 2019.

On January 27, 2020, SJ was sentenced to 21 years in prison for his role in the murder of Kamali Gabbidon-Lynck.