What is Ass Expansion Project?
The first project initiated by a newlywed wife. All the weight that was lost first to secure a steady relationship, then to look good for the wedding is added back on with a six week time period. After the sixth week the ass grows until the wife starts having to wear sweatpants and elastic pants.
Wow (insert name here)'s ass expansion project is ahead of schedule....Ewww!
note: In mixed company sometimes it is appropriate to use the term "expansion project"