"Threadbombing" is posting an image (or images) with superimposed text in a forum thread; usually to illustrate a point. Often, the "threadbomb" conveys a humorous message of disdain towards the original poster or the entire thread.
That noob needs to read the forum rules. He's been threadbombing our board all day with his tired images.
מאת gerbert 21 בינואר, 2007