"dc" doesn't mean what I think it means

I've been putting off doing more crochet work because of my knitterly brain. Every time I looked at a crochet pattern that called for a "dc" I would read it as "decrease", like any good knitter would. This, however, in crochet language means to do a "double crochet". So stupid me finally figured it out and was able to whip up this head band with a (humongous) flower using this pattern. I think the flower is supposed to be this big and it looks kind of cute, in a brain slug kind of way. And yes, that's toilet paper behind me.