The word "Djeet" is is the singular combination of the interogative phrase "Did you eat?" It is a Mid-Atlantic, American-English colloquialism, cheifly used by Philadelphians and in surrounding areas.
Decades-old slang for the phrase "Did you eat yet?" Native to urban East Coast cities, such as New York, Philadelphia, and their blue-collar suburbs. It's a pun which not only references the regional accent but is also a mild ethnic joke referring to people of the Jewish persuasion.
Mark says, "Djeetyet?" and Frank replies, "No, ju?"
djeetyet is a word that is symbiotic of an antire question, spoken with just one word/phrase. This is most commonly used in the deep south, by redneck hillbillies with at least two teeth missing.
Coversation flow:
Hillbilly #1: Djeetyet? (Did you eat yet?)
Hillbilly #2: Nodjyu? (No, did you?)
Hillbilly #1: Yumptu? (Do you want to?)
Hillbilly #2: Aight. (Alright. "aight" is typically only spoken by blacks and people that think that they are black.)