Inline linking (also known as hotlinking, leeching, piggy-backing, direct linking, offsite image grabs, bandwidth theft) is the use of a linked object, often an image, from one site by a web page belonging to a second site. The second site is said to have an inline link to the site where the object is located.
Read more about Inline Linking: Inline Linking and HTTP, Common Uses of Linked Content, Controversial Uses of Inline Linking, Copyright Law Issues That Inline Linking Raises