In certain contexts the "s**t" word would do.
One example from the novel "World Gone By" - by Denis Lehane:
Joe lifted the receiver off the cradle. “Tell him to f*ck off,” he said kindly.
“I tried,” Margaret said, “in so many words.” “Then use the exact ones.”
“He said to tell you ‘Theresa Del Fresco asks for an audience.’” “sh*t, really?” Joe said.
“sh*t really,” Margaret said. Joe gave it some thought for a bit and eventually sighed. “Send him in. He a yokel or an operator?”
One can see that Joe "has a feeling" when he says "sh*t, really?", confirmed by what he does afterwards, tell her to send him in.