Smile or not =X?

WTH =X?

Is that not the most serious, death-killing smiley ever!? I was just talking to someone and i think i got them angry, and they used that, it was like, a cold, icy stare telling me i did wrong! Lol =(

I think it's more of a secret keeping smiley actually. Sort of like my lips are crossed?

Or like an "Oops, I really didn't mean to say that" smiley.

I'm with the secrets. Or using it to say you want to say something but you aren't going to?

it's a miffy!