A not-so-obvious amateur or unqualified person passing them-self off as a professional for personal gain, not necessarily out of malice.
My cab driver was a real perfessional, he/she got lost on the way to the airport. My doctor is so perfessional, he/she performed an abortion the very same day he/she swore the Hippocratic oath!
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.