Passing gas into another's mouth and subsequently having that person exhale into the flame of a lighter, creating a blowtorch effect. Often peformed as the grand finale to a rusty trombone concerto. Can also be used as a means of ignition for the Amazon Firefighter.
a.k.a. Rusty Flamethrower.
In honor of my birthday, Allison used a rusty blowtorch to light the candles on my cake.