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1. An animal, such as a leech, that sucks blood.
2. An extortionist or a blackmailer.
3. A person who is intrusively or overly dependent upon another; a parasite.

blood′suck′ing adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.bloodsucking - drawing blood from the body of another; "a plague of bloodsucking insects"
bloody - having or covered with or accompanied by blood; "a bloody nose"; "your scarf is all bloody"; "the effects will be violent and probably bloody"; "a bloody fight"
2.bloodsucking - of plants or persons; having the nature or habits of a parasite or leech; living off another; "a wealthy class parasitic upon the labor of the masses"; "parasitic vines that strangle the trees"; "bloodsucking blackmailer"; "his indolent leechlike existence"
dependent - relying on or requiring a person or thing for support, supply, or what is needed; "dependent children"; "dependent on moisture"


Of or characteristic of a parasite:
Slang: freeloading.
References in classic literature ?
At length, however, we reached the shadows of the forest, while right behind us sprang the swiftest of our pursuers--a giant plant man with claws outreaching to fasten his bloodsucking mouths upon us.
Here, Blade is forced to join forces with his old foes the vampires to take on a new evil - the bloodsucking Reapers.
Together with his secret lover - the daughter of vampire king Viktor - Lucian raises an army worthy of taking on their bloodsucking oppressors, beginning a centuries-long conflict.
He thinks he can turn an assuming girl (Sheila Vand) but quickly learns that you shouldn't judge a bloodsucking vampire by her demure appearance.
Summary: Anyone who has seen Jim Jarmusch's wry vampire comedy "Only Lovers Left Alive" will recall the scene close to the end of the movie, in which the immortal, bloodsucking lovers Adam (Tom Hiddleston) and Eve (Tilda Swinton) cease wandering the narrow alleyways of Tangier to marvel at a throaty, hypnotic performance of the love song "Hal," by Lebanese singer-songwriter Yasmine Hamdan.
A girl at Hinata Sorazono's school has been attacked, apparently by a bloodsucking monster, and everyone is at edge.
When the 24-year-old finally discovered the clot was actually a bloodsucking worm, she went to a doctor who pulled it out using a nose forceps and tweezers.
I was amazed at the latest claim by the bloodsucking HS2 leaders and backed by our Transport Secretary, to pay at least 30 engineers in excess of PS142,000 each
Set in 1913 England, the bloodsucking, but handsome, charming and seductive, Count Dracula seeks an immortal bride.
Wednesday Bloodsucking vampires will be running amok on the lawns of Birmingham Botanical Gardens, as Heartbreak Productions presents their open air version of Bram Stoker's Dracula.
So there's only one thing for it: Oliver has to find the bug in the house and get it to bite him, too, so he can show off the spectacular Wenghi Benghi boils - and turn into a bloodsucking zombie killer.
From there it wasn't such a massive conceptual leap to having a bloodsucking guitar instead.