One of my characters blurts out "Jesus!" when he's surprised or alarmed. I've just realised he shouldn't be doing that because his father was a priest and he would have grown up with a big aversion to blasphemy. I could cheat and say he overcame his aversion once he was an adult, but I feel like it would be pretty ingrained. For similar reasons I don't want him shouting "fuck!" or "damn!" I don't think any swearing would have been allowed in their house and he would only swear when he was really angry or stressed, not just because he's surprised. It's not like a catchphrase - he says it approximately once every 10,000 words - but I do need a word to replace Jesus with (sorry, Jesus). Any suggestions for other words I can use to fulfil this role? Personally I have no aversion to blasphemy or cursing, so I either say "Jesus" or "fuck me." Edit: I just thought of "Whoa!" Not sure I like it, but maybe that's because it's not something I say or hear. Thoughts?