An opera coat is an ankle- or floor-length loose-fitting coat of luxurious fabric such as velvet, brocade or satin, to be worn over an evening gown or a man's tuxedo. It may be described as a fitted cloak with sleeves and is generally not as tailored as a coat. Men's opera coats are frequently worn with a cane and top hat.

Like cloaks and capes, the opera coat is usually lined in a coloured expensive fabric such as silk or a weave like satin, for a more opulent look. An opera coat often has an elegant or dramatic collar and may have padded sleeves. It may or may not be trimmed in fur. It often has an elaborate braided rope instead of buttons at the neck

David Parkin (born 12 September 1942) is a former Australian rules footballer and four-time premiership coach.

He attended Melbourne High School and during his time there, was the school vice-captain and captain of football.

Parkin was a tough back-pocket player who played 211 games for the Hawthorn Football Club (and kicked 21 goals) in a career spanning from 1961–1974. He won the Best and Fairest award for Hawthorn in 1965, and was captain of the club from 1969–1973. He represented Victoria 5 times at interstate football, and also played in Hawthorn's 1971 premiership.

Parkin went to Western Australia and captain-coached Subiaco in 1975. He was back at Hawthorn as Assistant coach to John Kennedy in 1976. Kennedy retired at the end of 1976 and Parkin was promoted to senior Coach.

Parkin was an innovative coach, first with Hawthorn (1977–1980), winning a flag in 1978. He coached Carlton in his first stint from 1981–1985, winning back to back premierships in 1981–1982. He coached Fitzroy from 1986–1988 with little success, and then returned to Carlton for another stint between 1991–2000. He was named Carlton's coach in their Team of the Century, and during this second stint he won the 1995 premiership. He also took Carlton to the Grand Final in 1999 which they lost to Kangaroos, at the end of the 2000 season he retired as Carlton coach and handed the coaching reins to Wayne Brittain .