Since the term is slangy, make sure older relatives understand it’s a diaper shower so they aren't confused by the "party" branding.
A "family piss party" is not a widely recognized or traditional term. However, based on the context, it seems you might be referring to a gathering or celebration where family members come together, possibly involving games, activities, or discussions that might not be suitable for all ages. family piss party
While the name is playful, the goal is still to honor the growing family. Ensure the environment remains welcoming for all generations. Since the term is slangy, make sure older