Jaume Marquet Cot, also known as Jimmy Jump, (born 1974) is a Catalan (Spain) real estate agent and pitch invader.

His most famous sports field invasion occurred on July 4, 2004, during the Euro 2004 final between Greece and Portugal in which he threw an FC Barcelona flag at the Portuguese captain - Luis Figo - who left that team to join their rival Real Madrid in 2000. He also ran through the starting lane at the 2004 Spanish Grand Prix, and invaded the pitch during a La Liga match between Real Madrid and FC Barcelona on November 19, 2005.

Another invasion by Jimmy was made during the second leg of the 2006 UEFA Champions League semifinal between Villarreal CF and Arsenal FC. He ran on to the pitch just before the second half began and tossed a Barcelona jersey at Arsenal striker Thierry Henry, with Henry's name and the number 14 printed on the back. (On June 25, 2007, Henry was transferred to FC Barcelona and was given his number 14). Jimmy was apprehended and taken into custody by stadium security, and later fined €60,100 by Spain's sporting anti-violence commission.

During the 2007 CL final between A.C. Milan and Liverpool F.C., he ran onto the pitch holding a Greek flag, but was not shown during the live broadcast. He also entered the pitch at the start of the second half of the 2007 Rugby World Cup final between England and South Africa. One of his other invasion was at the end of the Euro 2008 semi-final match between Germany and Turkey in Basel, Switzerland - this time he had a Tibetan flag and wore a T-shirt with an inscription "Tibet is not China". Jimmy Jump entered the stadium in the la liga match between Barcelona and Racing. He was finally caught by Samuel Eto'o who persuaded him to leave the field.

During the 2009 Men's Singles Finals of the French Open he accosted the winner Roger Federer, attempting to place a red beret on his head.