The act of simultaneously extending both fists with a middle finger salute. Most often seen in high-stakes sporting events and highly congested concert venues. For specific meaning, square definitions of “the finger,” “the bird,” “flipping the bird,” “flipping off,” “the finger wave,” and the “read-between-the-lines.”

Etymology: originating from words “double” and “bird”
M. Adams: Did anyone see the Ohio State-Michigan game yesterday? One of the players flipped the derble to somewhere in the neighborhood of 100,000 fans on national television.
by Marco Shark December 7, 2013
Get the Derble mug.