Editing a person's digital picture frame to include a picture of oneself, or inserting a lewd, disgusting, or pornographic picture into the shuffle of said frame.
Any attempt at changing a friend's (or enemy's) home screen or profile picture to a different picture--usually something pornographic, lewd, or disgusting.
John went around framejacking his friends' digital picture frames. Now after their tea party pictures, there are pictures of two guys snowballing.
When a webpage hijacks another webpage by loading it in an HTML frame with a small "bar" at the top of the page.
Framejacking: ht.ly and su.pr are two URL shorteners which framejack other webpages. The linked-to webpage is on the su.pr domain, with a small toolbar at the top.