Which of the following clinical signs is commonly associated with gastric outlet obstruction?

A succussion splash is a splashing sound heard during gentle shaking of the abdomen, indicating the presence of both fluid and gas within a distended and obstructed stomach. It is a key clinical sign of gastric outlet obstruction, where delayed gastric emptying leads to fluid retention in the stomach. This sign helps differentiate gastric outlet obstruction from other causes of vomiting or abdominal distension. Other options such as Kussmaul sign, Murphy's sign, and Trousseau's sign are not related to gastric outlet obstruction but pertain to different clinical conditions.

Reference: Bailey & Love’s Short Practice of Surgery, 27th Edition.