(plural: ‘leeches‘; for the right pronunciation, please click here)
a person, especially a financier, lawyer or trader, who tries to make profit out of another person, mostly by cheating or telling lies;
a person who continually begs for money or other favours from his/her friends and relatives, usually annoying them so much that they avoid him/her;
(old usage) a physician,
Everybody says that Mr Irfan, the only money lender in our village, is a leech, but the funny part is that everybody who accuses him of being a leech goes to him regularly to borrow money for their every need!
Andy is a typical leech; for, whenever you meet him, he comes up with one or the other miserable situation he is in and begs for money.
In olden days, physicians were called ‘leeches’ because they used leeches, the worms that live in water, in treating some diseases with the belief that when the leeches were left on patients, they would suck the impure blood from the patients, and with the impure blood gone, the patients would be free of their diseases — even these days, there are some medical treatments in which blood-sucking worms including leeches are used!