A square piece of cloth used for wiping the eyes or nose or as a costume accessory(noun)
WordNet. Princeton University. 2010.
Use "hankey" in a sentence
"You were watched all the time and if a girl danced too close to a man or a man danced too close to a girl or they saw any kind of hankey-pankey going on, don't think that they didn't come right in and make a scene about it!"
"It was I who added counters to his stakes, just once or twice, and not nearly as often as they said - why, I was quite shocked when I read in the papers last week, the kind of evidence they were giving, even Mrs Wilson - dear me, if there had been that much hankey-pankey with the counters the whole world must have seen, the Prince and everyone!"