Definitions by DaZuhalter

Milkman's Son 

Someone who isn't their dad's biological child but thinks they are. Typically used as an insult to imply this without actually knowing.

He's the milkman's son.

Milkman's Son by DaZuhalter November 22, 2021

Cuckold 

Man who raises another man's child without knowing. Derived from cuckoo birds who will trick or force other birds to raise their young.

Similar to Milkman's child/son/daughter

Peter is not his kid. He was cuckolded.

Cuckold by DaZuhalter November 22, 2021