The act of Fiddlefucking can mean a number of things.
1]Wasting time
2]Messing with something (attempting to fix something, mainly hands on)
3]Performing 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 insult. Doesnt really mean much, though one can assume the person you accuse of being a fiddlefucker infact has sex with fiddles. The Troma movie Tromeo and Juliet made this word popular upon its release.
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.
"Base we've got some square groupers floating outside of Miami harbor."