Whistling Curses

Apparantly you can whistle curses (I don´t know if this is exclusive to Mexico or this is something you can do in all Spanish speaking places).  The main one that people whistle is "chinga tu madre", which basically means "fuck your mother" and is more or less the worst thing you can say here.  To whistle it, you just whistle (or honk your horn) to the cadence of the syllables of the phrase in a bit of a melody.  You can even respond "el tuya" (yours also) with 3 short whistles or honks.

Strange.  I wish we could do that in the US....