In addition to, and to clarify, the other definition:
A person (often female) is dressed down when she is wearing clothes that do not accentuate her voluptuous parts (if any).
Despite her attempts to dress down by wearing long pants and a coat, that shit was still poppin' out all over the place!
The act of forgetting that it is dress down day and arriving in your regular work wear.
Joey turned up to work in his normal work clothes whilst all his colleagues had remembered to come in casual clothing, Poor Joey has some kind of Dress Down Syndrome.
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.