Originating in the U.S. Army of WWII, this is the shorthand slogan to describe the hygiene preparation an enlisted soldier must do to ready himself for a military inspection by superiors.
"Shine" refers to the careful and thorough polishing of one's black military boots.
Now it has entered civilian use to mean preparation for any important social event in which one must look good, often abbreviated nowadays to just "shit, shave and shower".
Soldier 1: "We've got an inspection later today from the brass."
Soldier 2: "Guess it's time to shit, shave, shower and shine."
Short-hand for the word floccinaucinihilipilification, meaning the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).
Precedes or follows either a gratuitously disrespectful or honest remark, originated in New York City. Used in similar fashion to "no offense" or "to be honest," interchangeably.
Ya mans is wild buns, respectfully. Respectfully he's washed.
After school, The Modells on Jamaica Ave was active. Respectfully.