Here's a breakdown:
* est-ce que: This is a phrase used to form questions in French, similar to "is it that" or "is it the case that" in English.
* grand jeté: This is a ballet term referring to a large jump where the dancer leaps forward and extends both legs to a horizontal position.
* peut-être: This means "maybe" or "perhaps".
Therefore, the entire phrase is asking if a grand jeté is a possible move.