Never understood this

I say knickers.

Knickers always makes me imagine old man underwear that like puff out from the waist and then has two bands on the leg that go right above the knees.

Welcome to Britain. Where panties are called knickers or pants and no on has any clue what we are trying to say unless you have lived here your whole life.

Wait, you mean everybody doesn't call them vagina covers?

^ This. People should do this...
Proof I should never have children, because I would teach them to say alternate names of everything.