Two individuals,
undefined in
orientation and/or gender, each partaking of one half of a mans penis,
divided lengthwise, by means of oral suction.
After a heated arguement, they decide to
compromise and perform the dueling
harmonica.
Guy 1: Yo, these two babes shared my donicker
last night.
Guy. 2: You mean they gave you a dueling harmonic?
Guy 1: Yeah, I guess.