Buzzer Beater Baby

A buzzer beater baby is a baby that is conceived after the man has gotten a vasectomy. This is possible because after a vasectomy, there are still sperm cells in the vas deferens that can remain there for weeks or months. For this reason, doctors recommend waiting about 20 ejaculations to have unprotected sex. The term "buzzer beater" is used in basketball when a player scores a basket with no time left, similar to impregnating a woman on of the man's last fertile ejaculations.

Ashley: I think I'm pregnant!?!?
John: How is that possible? I got a vasectomy two weeks ago?
Ashley: It must be a buzzer beater baby.