In The Rise of Skywalker, there's a point where Resistance fighters are performing an assault along the surface of a Star Destroyer, and Admiral Pryde reacts by telling a crew member to "jam the speeders". The crew member states that the Resistance members aren't using speeders, and it's revealed that they're riding horse-like animals for their assault.
Is there any explanation of what "jam the speeders" actually means, or what it would achieve, in any other Star Wars media (Legends or canon)? Particularly, is there any example of it being used successfully at any point?