Sentence:  "I asked about his Joes, he said the Joes could look after themselves and if Jack was bothered about them he could send a  <WSD>locum</WSD>." 
Meaning of the word marked with <WSD> tags:  (locum tenens)<ref name="COED-pron&def">The '''Concise Oxford English Dictionary''' [Eleventh Edition]</ref>