This sound is from Peter Griffin Soundboard

MacFarlane was asked to pitch a pilot to the Fox Broadcasting Company based on Larry & Steve, a short made by MacFarlane which featured a middle-aged character named Larry and an intellectual dog, Steve. He has appeared in several pieces of Family Guy merchandise, including toys, T-shirts, and video games.
See also: Griffin family, Peter A. Griffin, Meg Griffin, Peter Griffin (disambiguation), Peter Griffin (singer), Lois Griffin.