Noun
under-shoulder swing-down; technique of grasping the arm of the opponent, the moment he comes forward, while stepping out of line and pushing down on the shoulder blade with the other hand, thus pulling him down
Sumo
dodging; parrying (questions)
see 肩透かしを食わせるsee かたすかしをくわせる
disappointment; letdown
Also written 肩すかし【かたすかし】