A Facebook friend wrote that a companion had used a hand gesture which she had not seen used in years. The gesture: hold up your left forefinger; take your right forefinger and slide against the left forefinger.
She said that her companion meant it to show surreptitiously placing a tip.
When I was a kid, sliding your right forefinger on the top of your left forefinger meant SHAME-SHAME!
I wonder if kids still do that today.
CLICK HERE to see the BLOG article from eppylover: "Mystery Of Origin Solved: Shame-Shame".
Different cultures have different hand signals; many American hand gestures are offensive in other cultures (see the demonstrations from You Tube).