Mark Blackburn (numismatist) Society (FRHistS). He was awarded the 2008 Medal of the Royal Numismatic Society. In 2008, he was awarded the John Sanford Saltus Medal by the British Numismatic Society. In 2011, he was awarded the Derek Allen Prize by the British Academy. Mark Blackburn (numismatist) Mark Alistair Sinclair Blackburn, (5 January 1953 – 1 September 2011) was a British numismatist and economic historian. He was Keeper of Coins and Medals at Fitzwilliam Museum from 1991 to 2011, Reader in Numismatics and Monetary History at the University of Cambridge from 2004 to 2011, and a Fellow of Gonville and Caius College, Cambridge
P.S.K. What Does It Mean? was first used on the song "Rock 'N' Roll" which later became "You'll Be Under My Wheels". The second time they used it is from a song called "Lyrical Terrorist" which later became "Serial Thrilla", but it was soon used on the album "The Day Is My Enemy". P.S.K. What Does It Mean? "P.S.K. What Does It Mean?" (also written as "P.S.K. (What Does It Mean?)") is a song released in 1985 by Philadelphia rapper Schoolly D on his independent label Schoolly D Records. P.S.K. is the abbreviation for Park Side Killas, a street gang with which Schoolly D was