Term used to describe a girl who has slept with more than one menber of the same family or a close group of friends.
"Joe did you get the family bucket last night too?"
"Yeah.... she was better than i thought she would be! a bit greasy but I was still licking my fingers this morning!"
The act of going to kfc, ideally with the intention to buy a family bucket between 2-3 people.
"im dying here - wanna family bucket it?"
"i dont f**king care for the gig, i family bucketed so im happy"