No, it doesn't mean you're a pussy when you say it (to the definition above). A pussy would give excuses and try sugarcoating it, after his victim says "what did you call me".
After you say "you heard me", your victims just shuts up and looks shocked, beaten and despaired.
-What the fuck did you just say?
-You heard me.
-Dad, I'm attracted to men.
-What the fuck you say?
-I mean, I sort of like men. They are just... Uh, it's not a big deal, right? *scared face*