He was singularly skilful in leaping nimbly from one horse to another without putting foot to ground, and these horses were called desultories.
Desultory means to be "marked by lack of definite plan, regularity, or purpose, or otherwise not connected with the main subject". A desultory person may jump from one thing to another (Desultory Definition & Meaning). Rabelais describes the horses as desultory as Gargantua shows off his talent for jumping between these horses. Rabelais describes Gargantua as "singularly skilful" in his jumping from horse to horse. Rabelais is alluding to the obsessive efforts of the "Renaissance Man" during his time (Merritt, "Unquenchable Thirst"). These men who were obsessed with becoming multi-talented ended up missing the importance/depth of individual 'horses', or without "putting foot on the ground" like Gargantua. Gargantua jumping from horse to horse offers a ridiculous way to satirize the "Renaissance Man".
“Desultory Definition & Meaning.” Merriam-Webster, Merriam-Webster, www.merriam-webster.com/dictionary/desultory. Accessed 28 Mar. 2025.
Merritt, Yvonne. “The Unquenchable Thirst to Understand: Francois Rabelais’ Satire of Medieval and Renaissance Learning in Gargantua and Pantagruel.” Ampersand the Science of Art. The Art of Science., itech.fgcu.edu/&/issues/vol2/issue2/rabelais.htm. Accessed 28 Mar. 2025.