If a criminal is bailed but goes on the run instead of returning for trial, they are said to have "jumped bail".
2 - jump bail
informal - Fail to appear for trial after being released on bail:
he jumped bail and was on the run until his arrest
When was "jump" first paired with bail to create this phrase?
None of the dictionary definitions of 'jump' carry the sense of avoidance other than to perhaps skip over something, whether literal or metaphorical. Even then, it would seem that it is not the actual "bail" they are avoiding; more like they are 'extending' their bail illegally?