If there's an ADPi chapter on your campus, you've probably seen two ADPis each stick out their index & middle fingers to match the other ADPi's and make a diamond < > like that.
Well, mr. honeychile, our friends & I were driving down I-95 (?) to Florida for a convention when I saw an Alpha Delta Pi decal on the car in front of us. I excitedly told mr. to pull up alongside, and when he did, I made my half of the < against the window. It was a few sisters, and they all did it back and we honked and went our ways. Mr. honeychile (who didn't have GLOs on his campus & is still a little clueless about "the sorority thing") tells about how we almost got killed because I needed to make some secret sign to other ADPis. I tell him that, if it were a secret sign, I would have killed him by now!
I ran into another ADPi while in the elevator to a top-floor restaurant. We both noticed each other's recognition pins at the same time!