humbug
Too wasted to have the stamina to utter "bah"? 
No, just well read. The phrase "Bah humbug" does not appear in Dickens.
"Bah!" said Scrooge, "Humbug!"
He had so heated himself with rapid walking in the fog and frost, this nephew of Scrooge's, that he was all in a glow; his face was ruddy and handsome; his eyes sparkled, and his breath smoked again.
"Christmas a humbug, uncle!" said Scrooge's nephew. "You don't mean that, I am sure."
"I do," said Scrooge. "Merry Christmas! What right have you to be merry? What reason have you to be merry? You're poor enough."
"Come, then," returned the nephew gaily. "What right have you to be dismal? What reason have you to be morose? You're rich enough."
Scrooge having no better answer ready on the spur of the moment, said "Bah!" again; and followed it up with "Humbug."
You're welcome.