What in (the) Sam hill

What the hell...
(An elaboration of what. Sam Hill is a euphemism for hell. Often with the force of an exclamation. See examples for variations.)

What in (the) Sam Hill is going on around here?

What in (the) Sam Hill do you think you are doing?

by AmSh August 19, 2012

what in sam hill

What in the world...?

What in sam hill are you talking about?

by giselle gardonyi July 20, 2004