One who chooses to add to the breadth of their education by embarking upon a program that may award him/her a master's degree, a Ph.D, or no degree at all. While this decision may, under very particular circumstances, lead to a position as a tenured professor in a university, it will most likely lead to a decade or more of delaying the individual's entry to what most people would call the "real" world. Becoming a graduate student allows one to enter the self-perpetuating institution of academia.
Ex. 1
Typical sign in a physical sciences laboratory: "Do not feed graduate students and other lab animals."
Ex. 2
Grad student: "I'm writing a thesis on the remnants of Victorian culture in modern stereotypes of Transylvania."
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!"
A woman, with incredible game, who seeks out male musicians or other celebs in search of a husband. Her sexual skills and beauty tricks the eye of the celebrity and he falls for the 52 fake-out. Marriage or pregnancy is how she traps men.
She is called a "graduate" because her ability to land a man is beyond extraordinary and she has been passed around the entertainment and professional athletic industries. Graduate groupies have PhDs in making men believe they are marriage material.