A chorus, usually near the end of a song, where everything but the vocals, and perhaps the drums, drop out. It’s a fantastic way of introducing contrast and (potentially) getting the audience to sing along
Here are two examples (the drop chorus happens right at the end. Sorry to those of you who have a low tolerance for cheesy rock):
[youtube=http://youtube.com/watch?v=GccfzxHIXaY]
[youtube=http://youtube.com/watch?v=6-4VOLeKBOw]
[...] a good point. There’s no point worrying about the bassline, the drop chorus or the guitar solo if you haven’t written anything yet. This post should give you a couple [...]