Where the children/relatives of a known ginger person display signs of their ginger heritage either by the faint warm glow of auburn or "Strawberry Blonde" in their hair or their excessive amounts of freckles (non UV radiation caused).
"Those kids of yours look abit ginnerish, is your husband a Ginner?"
"I say Beverley! That new boyfriend of yours is positively ginnerish. Lets burn him!"