Rusty Pelican
Variation of a Rusty Trombone. While a man is having his balls mouthed from behind/underneath, his partner tucks his balls inside her lower jaw and generously reaches around to give a tug. The male recipient farts causing the rectum-facing ball handler to madly flap her arms in an effort to wave away the noxious gas - resembling a pelican taking flight.
I walked in on Dina and Ben last night right at the gassy crescendo of a Rusty Pelican.