A brief Google shows a high probability that I coined this phrase: “Moustache Fu”. Though it might conjure up notions of a hipster learning martial arts, it’s intended to describe a certain circle of coding hell, as in “I’ve just encountered code written by a 9th degree blackbelt in Moustache Fu”.

Basically it means that you’ve over-used and abused a templating system like ASP or PHP, and have to break in and out of ‘code’ tags constantly, leaving you with lines like this:

1

<% } %>

or

1

<% { %>

That code smells, and means that the rest of the file that poor sap wrote is probably garbage as well. Hiyaaaa!