"It actually means 'You, um, breed with the mouth of a goat,'" Castiel says with the barest laugh lifting the smoky rasp of his voice and a corner of his mouth. Dean and Sam exchange looks of lowered brows but say nothing. Cas glances between them, waits for it - surely Dean will appreciate the irony - but they just stare at him.
He turns his palms up. "It's funnier in Enochian."