The phrase "walk on eggshells" is an idiom used to describe a situation in which someone is very cautious, careful, or anxious about their actions and words because they are afraid of causing offense, making a mistake, or upsetting someone. It implies a feeling of extreme sensitivity or fragility in a particular situation, where any misstep could have negative consequences.
For example, if someone says, "I have to walk on eggshells around my boss," it means they have to be very careful and cautious in their interactions with their boss because they fear the boss's reaction to even minor mistakes or disagreements.
This idiom conveys the idea that the situation is delicate and that people must tread carefully, as if they were walking on fragile eggshells that could break easily.