1 definition by thatoneguyfromthe90s
To have sex with someone else after recently breaking up with your ex. The faster you move on, the faster you get over them. Like FedEx (fast shipping/movement, fast delivery).
As Jenna was heartbroken over her recent break-up, she applied the FedEx Rule to herself and was over her ex in a week.
by thatoneguyfromthe90s December 29, 2016