What do they call it? In New York, it depends on what neighborhood you're getting it in, but shawarma or gyros are probably the most common ways you'll see it advertised.
Who makes it? Turkish, Afghan, or Pakistani people.
When do you eat it? Lunch or dinner.
Is it drunk food? You got that right.
What's in it? It can be ground meat that's been packed together, skewered, and grilled, or it can be your more European-style greasy meat pile. It often comes with lettuce, tomato, rice, and falafel. And it's definitely worth the indigestion to ask for lots of "white and red."