Your Mom is a USSBBW, which is an abbreviation for Ultra Super Sized Big Beautiful Woman. Ladies in this category generally weigh more than 600 pounds (272 kg). They are larger than SSBBW. Some of them are immobile.

Your mom was napping in the living room when you came in the house after school, and your mom's stomach growled super loudly

Mmph, Hey son/honey, how was your day at school?