The act of Fiddlefucking can mean a number of things.
1Wasting time
2Messing with something (attempting to fix something, mainly hands on)
3Performing certain sexual acts on such female.
1 Bob! Quit fiddlefucking around and lets go!
2 Im taking my car to the shop, Im tired of fiddlefucking with the spark-plugs.
3 Dude! I was so fiddlefucking Sally in the back seat of your car!
An invisibly small violin played between the index finger and thumb for someone that whines about being a totally lame d-bag.
Guy 1: "Wow, I failed today's mid-term because I went to Julie's to do her homeworklast night instead of studying. Not to mention that when I finished her homework, she dumped me."
Guy 2: "Here, let me play you a sorrowful song from the world's smallest fiddle."