a bubble butt on a dago. Similar to a Brazilian booty. Sexy because of the mixed ethnicity of most dagos. Very common in the New Orleans area.
Guy1: Man, check out Sammi. She's certainly got a dago booty.
Guy2: Yeah, mix in some Italian, a little Spanish, a dash of French, and a pinch of whatever else, and simmer it all in New Orleans heat for several years and you got a dago booty.