Lyres For Hire made these wonderful lists of fantasy idioms from different races and classes. These would be really great to use when role-playing in a fantasy setting like Dungeons & Dragons, etc. An idiom is a saying people use that has a double meaning that wouldn’t necessarily be obvious if you didn’t know it. Some good examples from human culture are; “beat around the bush”, “miss the boat”, “break a leg”, “raining cats and dogs”, “speak of the devil”, “the last straw”, “see the light”, etc. Here are the fantasy idioms (check their page for more):

Source: Lyres For Hire