jump bail

[jump bail] or [skip bail] {v. phr.}, {informal} To run away andfail to come to trial, and so to give up a certain amount of moneyalready given to a court of law to hold with the promise that youwould come.

The robber paid $2000 bail so he wouldn't be put injail before his trial, but he jumped bail and escaped to Mexico.

The man skipped bail because he was afraid the court might put him injail for a long time.