It means a sucuk (the spicy dry sausage) sandwich. In Turkish if you tack on the word “ekmek” (bread) to another food word, you have a sandwich. See also “balık ekmek,” a.k.a. the grilled fish sandwiches sold around the Eminönü embankment in Istanbul. The Turkish word for fish is balık.
The Turkish word sucuk is pronounced “su-dzhuk” and is often rendered in English as sujuk. (It is not spelled suçuk, which would be pronounced “su-chuk.”)
