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camp follower   (camp followers plural ), camp-follower 
1  n-count If you describe someone as a camp follower, you mean that they do not officially belong to a particular group or movement but support it for their own advantage., (disapproval)  ...the Tory leader's friends and camp followers.  
2  n-count Camp followers are people who travel with an army or other group, especially members of soldiers' families, or people who supply goods and services to the army. 

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"Collins Cobuild English Dictionary for Advanced Learners 4th edition published in 2003 © HarperCollins Publishers 1987, 1995, 2001, 2003 and Collins A-Z Thesaurus 1st edition first published in 1995 © HarperCollins Publishers 1995"