This is an adaptation of Tim Douglass's Find Function Definition to work with CoffeeScript. I don't really know python, so I didn't do much of the work myself. The check_dirs function which weeds out javascript directories was written by @BlackDragonHunt. The regex by @ACEfanatic02. There could very easily be edge cases this doesn't catch, but for the most part, it should find your function for you. Just HIGHLIGHT the name of a function, press f8 (or set your own keybinding) and the plugin will open the file and take you to the function's definition.
Sublime Text 2 plugin to find and open a function's declaration in your project