Graduate's Tan
An ugly tan line across the middle of one's forehead resulting from being outside in the blistering sun for several hours while wearing a graduation cap.
Diane: "What's that discoloration on your forehead?"
Jack: "Oh, this? It's my graduate's tan from my college commencement service. It's like my second diploma. Having this is proof that I'm smart!"
Jack: "Oh, this? It's my graduate's tan from my college commencement service. It's like my second diploma. Having this is proof that I'm smart!"