Knickers is the correct terminology for a womens undergarments, the undergarment which is not a bra.
Other names are given for different styles of knickers as seen below.
The thong
The granny panties - which actually should be defined as granny knickers, but I'll let the people off seeing as most of these people are American.
bloomers
undies
panties
drawers
And many other ways.
Knickers can also be worn on one's head.
Also a good nickname for some named Nicole or Nicola.
Expression often uttered by the notorious Gordon Ramsay on Hell's Kitchen in response to overly-excited contestants that deliver 1 decently cooked dish and shit the bed for the rest of service.
Girl 1: OMG chef Ramsay served my wellington! *high five*
GR: Don't start peeing your knickers yet Amanda you slow cow.
Women stick them to their pants so they don't get bloody skids over their favourite 'Victoria's Secrets'.
Despite the fact that they are SANITARY towels, they are considered by the UK government to be a luxury product. This means that women get double-stuffed on a period...not only do they have to bleed for 6 days but they get taxed to do so.
Eve: Owwww, I've cut my finger! Have you got a plaster?
Lisa: Nah, but if it's bad i've got some rizlas or a knicker sticker.
A condition that results in the soiling of female undergarments due to extreme sexual excitement. This results in the kickers appearing to have a porridge like colour and texture stained into them.