(DUH-lu-T)--- Dlut stems from two words- the (d)from drunken, and the from (lut)slut. A female who becomes a slut only when highly intoxicated.
Carrie: Oh man, look at that girl! She's only has a couple drinks.
Rachel: Yeah, and after those drinks she became a total dlut!
When someone eats too much, and their stomach has the little roll. It looks some what similar to being under three months pregnant. As for the name, food baby it makes itself pretty self explanatory.
Rachel: Oh god I ate too much and now I have food baby!