"Pop one's clogs" is a colloquial expression that refers to someone passing away. This phrase can be considered crude or insensitive in certain settings, so it is important to find synonyms that convey the same message in a more respectful way. Some synonyms for "pop one's clogs" include "pass away," "depart," "die," "expire," "cease to live," and "cross over to the other side." Other less formal terms can include "kick the bucket," "bite the dust," or "shuffle off this mortal coil." It is important to be mindful of the context when using these expressions and to choose the most appropriate synonym for the situation and audience.