When a lady gets aroused and leaves slimy trails in her undergarments almost as if she has hidden slugs in them to prevent detection from customs.
“Oh Charles, the sight of you in your fancy king hat had me dripping like a broken refrigerator. I must away and change my Knick-knacks, as they are as if I have been slug smuggling.”
(Queen Camilla after the Coronation of King Charles III.)