An act of oral sex on a male recipient. Upon or just before climax, the provider must aggressively and continuously blow down the Urethra whilst inhaling air through the nose in an attempt to restrict/ stop the flow of ejaculate. This replicates the breathing technique used to play the didgeridoo.
Its where a person is laying on the bottom bunk of bunkbeds and the person on the top bunk slides a pools noodle down and makes didgeridoo noises into one end of the pool noodle and the person on the bottom bunk puts their penis in the other end of the pool noodle.