When several people surround someone and proceed to tickle the fuck out of them causing them to drool, piss themselves, and possibly even induce brain damage from lack of oxygen.
"We ticklefucked john so bad that he pissed all over my house."
"To enter into our homo group you must let us ticklefuck you for 48 seconds."
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!