in (the) Sam Hill?
Used as an intensifier after a question word (who, what, where, when, why, and how) to express extreme confusion, surprise, or aggravation. Often erroneously written or pronounced as "in Sam Hell." Primarily heard in US. And just how in Sam Hill am I supposed to have three reports done by 9 AM tomorrow? Where in the Sam Hill did you find that rusty old car? Who in Sam Hill is making all that noise?
Sam Hill
slang A euphemism for "hell," usually used for emphasis. What in Sam Hill are you kids doing in here? You're going to wake the whole neighborhood! What in the Sam Hill made you decide to fight one of your classmates?
soapy Sam
One who is slick and persuasive, especially in speech. The phrase originally referred to Samuel Wilberforce, a 19th-century Bishop of Oxford, who was known for such qualities. This guy is a real soapy Sam—the townspeople believe his every word, even though he has never delivered on a single promise.