This definition appears very rarely
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We have 39 other definitions for WP
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Samples in periodicals archive:
As regards my contribution to society, I think I've done my bit over the years, certainly more than those worthless parasites that call themselves royalty.
In Russia, patients over the age of 60 were considered worthless parasites, and those over 70 were often denied even routine care unless they were members of the elite class.
Why should we be proud of an elite group of worthless parasites who have only achieved/ maintained their position by privilege and wouldn't know what a proper day's work was if it was staring them in the face.