A parasite by definition is something who feeds off a person (or a so-called 'host').

1. A parasite in many examples could be a person who basically lives off another human being, without planning to pay them back in any way possible. This person basically takes advantage of the host or person they live off of, reasons could be of following: money, house, or food.

2. A parasite could also be something in a person or animals body. The parasite feeds off of the person/animal's insides.

3. Baby/Fetus. I techincally do look at as a baby or fetus as a parasite because it still is inside the body of a person or animal, and it does take nutriants from it's carrier.

See Mother In Law

A blood sucking vermin that drains strenght from it's host

One who lives off of society while simultaneously mocking and hating it.

a member of the royal family who lives off the taxpayer whilst giving little in return except for opening a few hospitals and shaking a few hands

Someone who loves paramore so much theyll do/say anything to figure out why you dont.

Any website whose sole purpose is to relieve its visitors of money, promising unfeasably poor services in return, although of course, you don't realise this until you've signed over your grandmother. Examples of parasites include E-Cards sites, Mobile Phone ringtone download sites (Jam**er), the various Outlook smiley plugin sites, microsoft.com.