 The show revolves around the adventures of the Griffin family , consisting of father Peter Griffin , a bumbling yet well @-@ intentioned blue @-@ collar worker ; Lois , a stay @-@ at @-@ home mother and piano teacher who is a member of the wealthy Pewterschmidt family ; Meg , their awkward teenage daughter who is constantly ridiculed and ignored by the family ; Chris , their teenage son , who is overweight , unintelligent and a younger version of his father in many respects ; and Stewie , their diabolical infant son of ambiguous sexual orientation who has adult mannerisms and uses stereotypical archvillain phrases . Living with the family is their witty , smoking , martini @-@ swilling , sarcastic , English @-@ speaking anthropomorphic dog Brian , though he is still considered a pet in many respects . 
