Halloween is next week and I want to be an ajuma. Any ideas on how to
make me the world's greatest ajuma?
Aside from snark in me that wants to chide you for not being very original, morphing into the world's greatest ajumma takes years and years of line-cutting and subway-pushing, but there a few accessories that can help.
To start with, I assume you're talking about a 할머니/아줌마 hybrid. These are usually the one's who people dress up as because they are typically the funniest.

If you don't have a perm, then you're not an ajumma. It's just that simple. There are many different styles you can sport though, so I would recommend heading to the local 주부 hairstylist in your neighborhood and start scoping out what works for you. The curlier or more dyed the better, but remember, there are varying degrees and forms of the ajumma. Your perm says a lot about you.

Eyebrow Tattoos
This one is simple. Even though the lady in the photo above didn't go for it, you should. All ajumma's must have temporary eyebrow tattoos. It'll run you about 80,000 won, but it lasts for a year.

Tacky Shirts
Take another look at that hybrid ajumma. That is pure ajumma goodness right there. She's got the furrow, the umbrella, the electric-looking collared shirt, the perm and the eyebrow tattoos. She's amazing. Finding the perfect shirt is very important. Flowers, bright stripes or animal-prints are a must and if you combine the shirt with baggy, black or purple pants with an elastic waistband, well, you might as well just move to the front of the line. You've earned it.
Active Ajumma
Have you ever seen an ajumma just resting? Doubtful and if you did, they were likely hitting their backs, stretching or getting ready for a fully decked-out hike around Seoul Grand Park. But most of the time, they're carrying bags of fruit or getting ready to dig around in some roadside soil looking for roots, but they're always on the move. The point is that you need to look busy. I would recommend buying some gloves, carrying heavy bags or maybe you could even prepare some vegetables just in case you find a good place to setup on the sidewalk.

The hybrid ajumma hates the elements. She doesn't like earth, wind or fire, so she protects herself. She might have her entire head and face covered or she simply might be going for the sun visor.

Any readers want to add something?