You yo daddy son 

A slag for calling someone ugly as referring to there family mainly their father as unappealing to others.

A term or saying that you use in calling someone out or poking fun at colleagues.

"You ugly ass mofo no arm lookin ass you yo daddy son."

"Your so ugly you yo daddy son."

You yo daddy son by Liam Franklin September 30, 2016

You yo daddy son 

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 “You ugly, you yo daddy son.” They Are calling you ugly initially, then linking that same adjective to your father.

Yo face nasty.
And you ugly and you yo daddy son.

You yo daddy son by razberrywaffle June 21, 2020