It's a type of sushi.

I didn't know that when I picked TheCrunchyDragon as my Lego Universe name way back in the day, and I've been using some variation of it ever since.

How crunchy is the dragon? 

Very.

One of my friend's sisters likes to say(before she found out I'm a guy) "WHY IS SHE A CRUNCHY DRAGON?? DID SHE GET COOKED??"