Sexy Gangbangs is closed, but the site it duplicated mentioned below is still open and there are plenty of other gangbang sites in the top 15 to your left.

You can call it a gangbang or you can call it an orgy. Either way, it refers to multiple people all fucking each other. You can also check out the site Sexy Gangbangs or the site Big Fucking Orgy.  No matter which one you choose, you are going to find a mediocre mega-site that tries to pass off threesomes as orgies and gangbangs. Oh yeah, almost all the content is the same on both as well.

The only thing different among the two sites is the first picture section (the second one has links that don't work on both sites). Anyway, the main photo section on Sexy Gangbangs features about 100 galleries with solo, one-on-one and threesome action (no gangbanging). At Big Fucking Orgy, there are about 50 threesome galleries. The rest of both sites is made up of hundreds of feeds (a few orgy ones) and 69 bonus sites filled with the same feeds and some mediocre-quality downloadable videos.