Read the Hadith and also the commentary given. Here dafaf means a get-together, when there are two or more people sitting together and eating. When The Messenger of Allah was alone he would eat anything that is available without any demands or so, but when he was with guests he was the best host.
Shama-il Tirmidhi Chapter 050, Hadith Number 010 (358).
Anas bin Maalik Radiyallahu ‘Anhu reports that: “At lunch or supper bread and meat did not appear together at the same time on the dastarkhan of Rasulullah Sallallahu ‘Alayhi Wasallam, besides at the time of dafaf.
The ‘Ulama give various meanings for dafaf. This has been explained in detail in the commentary of hadith number two of this chapter. Although the subject of this hadith is not the same as in the hadith mentioned there. Apparently it means, that when Sayyidina Rasulullah Sallallahu ‘Alayhi Wasallam was alone, he partook whatever was available for meals, even if it was only bread or meat. He certainly would make an effort to have both things available when visitors arrived.