To express suprise. It is the combination of "Oh", "My" and "God" to form an incoherant word. Usually used online since saying it outloud does not hold the same meaning, because peoplecant tell you meshed the words together.
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.