When you drop the letters U and R from your, and apply the word son, then decide not to publish the definition, because apparently the word "boxxhenizeel" was so much better.
Josh: I defined yo son on urban dictionary
UD: NO SON YOUDIDNT! HAVE A BOXXHEINIZELL DAY!
By Alyda
Yo Son
1.More of a new yorkers(between homeboys) way to open a story or talk about something that happend,2. To draw attention to by cutting off in-mid conversation.
1.YO SON..you see that bitch try*na dance, that shit was mad funny yo.
2. ''im telling you i was'',,,, YO SON i was there and and you never came, yo Son you be Stright Lieing.
Basically an insult calling you and your father ugly.
-(Explanation)-
You and your father look alike, and are genetically related, so (typically), if someone were to say āYou ugly, you yo daddy son.ā They Are calling you ugly initially, then linking that same adjective to your father.
Literally meaning FUCK YOU also dissing your mom at the same time. Since on the internet most of the people who will ever use this term is saying it to guys.