Navy Blue Flip Flop

navy blue
"Navy Blue" is the name of a song written by Bob Crewe, Bud Rehak and Eddie Rambeau. The song tells the story of a girl who was lonely for her steady boyfriend while he was away from home in the U.S. Navy and could hardly wait to see him again.
dark blue: a dark shade of blue
Navy blue is a very dark shade of the color blue which almost appears as black. Navy blue got its name from the dark blue (contrasted with white) worn by officers in the British Royal Navy since 1748 and subsequently adopted by other navies around the world.

flip flop
An abrupt reversal of policy
A light sandal, typically of plastic or rubber, with a thong between the big and second toe
reversal: a decision to reverse an earlier decision
A backward handspring
interchange: reverse (a direction, attitude, or course of action)
a backless sandal held to the foot by a thong between the big toe and the second toe