So Mi Shught, when said sounds exactly like "Sew Me Shut." It's all about being who you are no matter how many times you're silenced. It's the will to make your voice heard at least through your pen if you have indeed been sewn shut. It's also kind of like a dare. Like, "I dare the world to sew me shut. I'll be who I am regardless."
So, basically, it means finding a way, whatever way that may be, to be exactly who you are in spite of those trying to keep you down.