top (one)self
1. To commit suicide. Primarily heard in UK. A: "Did you hear that his father topped himself over the weekend?" B: "Yeah, I can't believe it. Everyone is still in shock."
2. To outdo or outperform one's previous effort(s) or achievement(s). Primarily heard in US. Wow, you've really topped yourself with these cupcakes, Stephen!
grasstops
The leaders of a group or community (in contrast to the "grassroots"—the common people). A: "If we really want to enact change in our neighborhood, we need to get the support of the grasstops." B: "Well then, let's go present our proposal at tonight's town meeting." The grasstops have totally ignored our petition—now what should we do?