Peter Griffin is the overweight patriarch of Family Guy.  Peter is voiced by the show's creator, Seth McFarlane.

Peter, of questionable intelligence and ambition, somehow manage to land the beautiful, intelligent, and wealthy Lois.  Hey, I guess that's why they call it television.

Although Peter's best friend is definitely his talking dog, Brian, he also has his great drinking buddies, Quagmire, Joe and Cleveland, who he gets into all sorts of zany adventures with.

Peter Griffin Quotes

Aunt Margarite [on her video will]: Lois, you were always my favorite niece; I just knew you would find a wonderful man who would make all your dreams come true. But I was wrong.
Peter: And now you're dead. Score one for Peter

The fact that your last name is Griffin is a pleasantry extended to you by the family, not a legality.

Peter
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Family Guy Quotes

Aunt Margarite [on her video will]: Lois, you were always my favorite niece; I just knew you would find a wonderful man who would make all your dreams come true. But I was wrong.
Peter: And now you're dead. Score one for Peter

But now that you mention it, your face looks like a used condom.

Quagmire