to consider doing something, but not seriously, or to be interested in something for a short time

I'm flirting with the idea of taking a year off and travelling round the world. 我心血来潮，想休假一年去周游世界。

to intentionally take risks and put yourself in a dangerous or difficult situation

Like a lot of young men, he flirts with danger. 和许多年轻人一样，他也喜欢冒险。