"the disgraceful Mrs Bloomer"
A bloomer suit from the 1850s
Public DomainA bloomer suit from the 1850s

Amelia Bloomer was an American temperance and women's rights advocate, and a supporter of the Rational Dress movement. Mrs Bloomer did not invent the eponymous trousers, but her support of the style led to them being named in her honour. 

The bloomer was invented by Elizabeth Smith Miller, who designed it as part of a more sensible costume for women, consisting of loose trousers gathered at the ankles, worn under a knee-length dress or skirt. It garnered more mockery than support from both sexes.

Mrs Bloomer eventually ceased to wear bloomers in favour of the crinoline, which she thought an acceptable improvement on preceding fashions.