You can also avoid pronuncing the "t" in shit; it's more classy.
The sound or the "â" is longer, like the one in Mârdi grAs.
ps. Marde=shit in French so the expression depicts shit made of shit.
boy: Shitdemârde! (said with sympathy)
girl: I lost my job!
boy: Shitdemârde! (said with alarm)