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Wiktionary
sheep-dip

n. A liquid formulation of insecticide and fungicide which shepherds and farmers may use to protect their sheep from infestation against external parasites. vb. The practice within the intelligence community of assigning to agents non-intelligence or military jobs in order to disguise their source agency.

Usage examples of "sheep-dip".

Herrold down until he clung now to a boulder for his life) had as well been a sheep-dip tank for all they paused or faltered.