MIMSHARE
This is for Mim Collective Members only - looks like you have to join instore, but you can get the 25% off there as well, by blowing up a balloon and 'checking-in' on Facebook
Mimco are having a promo where you can get 15%, 20% OR 25% off their full priced items. The online code for the 25% off is MIMSHARE. You're supposed to recommend the page on Facebook to get the 25% off, but you can just enter this code when you view your cart. It will automatically give you 15% off, but enter the code and it will change to 25%.
You can get the deal at Mimco boutiques or David Jones concept stores as well, as mentioned above you need to jump through a few hoops (blowing up a balloon and 'checking-in' on Facebook), but it's worth the 25% off.
Terms & conditions say that it's for full-priced items only, but when I put my order through yesterday it worked on sale items. Seems like they fixed that up now, but you can give it a go. Deal isn't valid on limited edition bags or their 'Mimco Loves' selections, whatever they are.