The Name derives from The Junkers Ju 87 or Stuka (from Sturzkampfflugzeug, "dive bomber") wich was a German dive bomber and ground-attack aircraft during WWII.
during Sexual intercourse the Male part stands up, while the other part is laying flat on the belly. The male part then proceeds to haul like a siren while jumping on the counterpart. The Stuka is only successful when a Penetration happens.
"He was fucking her Doggy-Style and then Stukaâd the Hell out of her Ass."
"As Terry saw no other possibility, he used the secret Technique his Grandfather had told him., the Stuka"