Kammerjäger

Etymology
Compound of. The word originally meant "princely huntsman", but was humorously reinterpreted as "exterminator" (someone who "hunts" in a private "chamber"). This reinterpretation began in and was later standardized with the humorous overtone being lost.

Noun

 * 1) exterminator; someone practicing pest control in buildings
 * 2)  personal huntsman of a prince