Your mothers so fat
She is at an increased risk of type 2 diabetes and heart disease.
( FoldsFive, Fri 12 Jan 2007, 23:40, archived)

A genuine conversation I heard:
"You're mum's so fat, when she goes to the cinema, she has to ask for two seats"
(the retort):
"Yeah, your mum's so fat, when she goes to the cinema, she has to ask for seventeen seats".
(rnuk http://flickr.com/rnuk, Fri 12 Jan 2007, 23:42, archived)