Are there any alternatives for swearing that don't sound incredibly dated?

So I made the mistake of giving my POV character the personality trait that she swears a lot, and I want to keep the attitude the same but cut back on the amount of swearing since it stops having real meaning after a while. The only problem is any of the synonyms for swears are incredibly dated (example: bullshit vs balderdash, hokum, codswallop, poppycock). What is the best way to write around that issue but still keep my character recognizable?