Abbreviated "the flubs", Double Flubble refers to a specific sex act between two men and one woman. The two men stand with their backs to each other, while the woman kneels between them and reaches through their respective legs, simultaneously giving each of them a handjob. (Kind of like a backwards Eiffel Tower)
Pro's: the guys don't have to face each other, and technically it is a threesome
Con's: makes for awkward conversation while it is taking place, and most women find it degrading
Last night, Jane got really drunk and performed a double flubble on myself and another male. I have no regrets.
Two Guys, One Rigl.
The word Double Flubble like doesn't exist, I asked like the biggest slut I know and she had no idea.