scare the bejabbers out of (someone)

To shock or frighten someone very suddenly and/or severely. ("Bejabbers," a variant of "bejesus," is a mild euphemistic oath used here as an intensifying noun.) Primarily heard in Ireland. Don't sneak up on me like that, you scared the bejabbers out of me! That car accident seems to have scared the bejabbers out of Janet—she's still shaken by it.