Of all the animals that we’ve examined in the microcosmos, leeches are probably one of the few that can be used as a verb, to leech off someone—to take and take from them, like a worm consuming someone’s blood.

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SOURCES:
https://pubmed.ncbi.nlm.nih.gov/10833...
http://www.bioone.org/doi/abs/10.1608...
https://pubmed.ncbi.nlm.nih.gov/26427...
https://www.britannica.com/biography/...
https://www.ncbi.nlm.nih.gov/pmc/arti...
https://journals.biologists.com/jeb/a...