If the answer is "yes", the chances are that you once studied Classics or History. For a "gobbet" (a word that also means a little piece of raw flesh) is a small snatch of historical "source" set for students to comment on -- and to explain the historical significance.
It's a venerable, traditional pedagogic exercise. And when I was an undergraduate, our history exam papers always started with a compulsory "gobbet" question: that was, about 10 short passages in Greek and Latin, with the instruction to comment on three. We dreaded this exercise. There were two ghastly prospects. Either you would be able to translate the thing, but wouldn't have a clue about the historical significance. Or you would think you could spot the historical significance, from memory at least (isn't this Plutarch commenting on the motivations of Tiberius Gracchus?), but you didn't remember it well enough actually to know what it was saying.
Soon after I went back to Cambridge as a lecturer in 1984, under the influence of the then Professor of Ancient History, Keith Hopkins, we abolished the gobbet question.