"Give It a Lash Jack" is a song by Liam Harrison and the Goal Celebrities. This song was made for Ireland's 1990 World Cup Campaign.
It reached No.1 in the charts in June 1990 and stayed there for 4 weeks. It was followed up in 1994 by Give It A Lash Again.
In a 2011 interview on RTE Irish Television, Jim Sheridan (Film Director) stated that Bono and himself agreed that Give It A Lash Jack was the 'greatest Irish song ever written'. Check it out here http://www.youtube.com/watch?v=tXmvlJApMqg.