Especially in their early training! I remember when learning to ride in my early teens, my instructor had a number of expressions that were nonsense.
We were running a Gymkhana this beautiful Sunday morning. Part of it was a cross country track for novice riders, which included a ditch. One of the ‘schoolies’ took the ditch with a big leap and afterwards showed her excitement with a sort of pigroot. Needless to say, the rider came off. The big leap had already unseated him.