A sexual move in which a man's limbs are bent in every which way until he resembles a human pretzel (they may break), and the woman puts her mouth around his dick (like one would a mouthpiece) and blows. This will tickle the man, and will make him giggle like a japanese schoolgirl
"Last night was the best. I got a the japanese tuba from this buff russian lady and I had to go to the hospital afterwards ."