A person born lucky, such as to a wealthy family.
Used in the popular 1969 Creedence Clearwater Revival "Fortunate Son"

The song that plays in basically every Vietnam War movie.

The song my Grandpa hates to hear especially when there is a helicopter nearby

When receiving fellatio, the recipient spreads the legs of the giver and partially lifts them in order to spin them around in a manner similar to a helicopter's blades.