Mall-shit can be used and interpreted a few different ways.
1. Girls under 18(sketch) usually used with the intention to insult.
2. Or in the case of actually being at the mall, any female shopping regardless of age.
keep in mind that everyone in their life is mallshit at one point.
1. "Sanchez, you are down with that mall-shit",,,,,or "whoa look over there at those girls...o wait never mind its just a bunch of mall-shit"
2. "o damn do you see that mall-shit in Baby Gap?! shes gotta a kid with her too!? Mall-Milf-shit"
"Dude.... that mallshit just ordered a happy meal fml"