A sexual innuendo of the word "medlar" in myShakespeare's Romeo and Juliet, Act 2, Scene 1.
Mercutio
And wish his mistress were that kind of fruit
As maids call medlars when they laugh alone.
The maids laugh because to meddle meant to masturbate, so a medlar was slang for a masturbator. They also laugh because of the fruit's nickname, which Mercutio mentions in the next line.