The act of dancing with one finger (generally the index finger) extended. Can be done with one or both hands.
Discofinger has existed as long as mankind; in ancient Egyptian hieroglyphics we see the pharaohs, digits extended in exaltation of what
can only be described as the precursors
The are many variations on the current discofinger--arm-pumping, twirling, the doorbell--and possible
adaptations are still being discovered
to this day.
While the rest of the crowd engaged in the ubiquitous "rock fist," Benway stood out from the crowd with his enthusiastic discofinger, thus showing
his appreciation of the tunage.