Your mamma's so fat that, when she sits around the house, she sits AROUND the house.
Since so many threads here rapidly descend to that level, I figured why not cut to the quick and just start there. So.....I invite anyone interested to contribute their own ''Your Mamma!'' joke. I'll start.
Note: These usually are done as "Yo' Mamma!" jokes with "ebonics" but I figured I'd play it safe and stay PC so as not to violate the TOS or ruffle anyone's feathers.
''Your mamma's so fat that she's got two other mammas orbiting her!''