barrel of fun

Noun

 * 1)  A great amount of fun or enjoyment, or something or someone that provides this.
 * We all went out to a karaoke bar and had a barrel of fun.
 * Two hours of root canal surgery – that sounds like a barrel of fun.
 * 1) * 1939, and Wladimir Timm (English lyrics), "", aka "Roll out the barrel"
 * ♫ Roll out the barrel, we'll have a barrel of fun Roll out the barrel, we've got the blues on the run