I'm not quite sure what the menu is called, but when I drag my mouse against the bottom of the screen in Gnome (1:3.14+3), a new menu appears. I do this by accident a lot and find it very annoying.
The Gnome package is Debian version 1:3.14+3, and according to /usr/share/gnome/gnome-version.xml
the version is 3.14.1.