This is the PalmOS implementation of a simple pen and paper game that is played mostly by Jr. High girls. Guys play it too - and the fun doesn't have to stop when you graduate to High School! *cough*
Mash stands for Mansion, Apartment, Shack, House. The game is played to determine the future of you (or somebody else). There are many variations of Mash, this current version only allows you to write down names, cars and numbers of kids.