On Poly is a phase used to indicate truth and agreement with something. It is used the same as "On God", except better. Poly in this case refers to the school Florida Polytechnic University.
"Did you see the parking lot? It was full again, they never have any open spots."
"On poly! I can never find a space :/"
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.