What you call your mom's house when thats the only place you go to wash your clothes because it's free.
Comes from the name Laundromat. Since it's you mom's house you call it Mom-dro-mat.
Can also be called Dad-dro-mat. If you go to your Dad's house.
Friend: Look at this huge pile of dirty clothes when are you going to wash.
You: I will when I get a chance.
Friend: When you get a chance? There is a laundromat right down the street.
You: No way I not paying to wash my clothes I go to my Mom's house.
Friend: Oh yeah the good ole Mom-dro-mat