Nicholas "Oz" Oseransky is a fictional character from the 2002 film The Whole Nine Yards, portrayed by actor Matthew Perry. Oz is a mild-mannered dentist who finds himself entangled in a dangerous situation when his new neighbor, a hitman named Jimmy "The Tulip" Tudeski, played by Bruce Willis, moves in next door. Throughout the film, Oz's life takes unexpected turns as he navigates the challenges of his profession and the criminal world. His character is known for his comedic reactions to the chaos around him, highlighting the contrast between his ordinary life and the extraordinary circumstances he faces.