A fork of Rural Dictionary
An STD that causes men to jizz caterpillar eggs. The eggs later hatch and the butterflies fly out of the vagina.
"Hey Samantha, why are you going to the doctor?" "I think Brad gave me the butterfly effect, I've got butterflies in my stomach!"
Your wife is giving birth, and you're filming, being the good husband you are. As soon as the baby comes out, you immediately grab your child from the doctor's hands, enter said child, then enter your wife with the baby on your penis, making sweet love to her.
"Hey, Bill, I heard your wife had the baby!" "She sure did! I gave her the ol' Greyhound!"