A massively popular first name, likely a variant of "Bart." Its popularity is so great that "Bort" merchandise frequently sells out in gift shops.
"We need more 'Bort' license plates in the gift shop. I repeat: we are sold out of 'Bort' license plates."
Small child: "Mommy, mommy! Buy me a license plate."
Mother: "No, come along Bort."
Man: "Are you talking to me?"
Mother: "No, my son is also named Bort."