To simulate a bubble gum bubble with the scrotum and a testicle.
To blow a bubble:
1. make a circle with your thumb and index finger, a little smaller than the size of a testicle
2. Pull some skin of the scrotum through the hole, so it hangs loose from the hole (be sure not to grab the testicle too)
3. With your other 3 fingers, slowly finesse the testicle through the hole utnil it pops completely through, filling the skin, resembling a bubble gum bubble.
When a girl has a mouthful of beer and gives a guy head while the beer is still in the girl's mouth. The beer reacts and starts to fizz causing bubbles she can only swallow when you have finished that is where you get the term bubble blow or the The bubble blow
''Man this chick I met last night was so drunk she had a mouthful of beer and was giving me head at the same time". ''Dude she gave you the bubble blow that's awesome she should receive a medal or something.