The Easter game in which players tap dyed eggs together to test whose shell remains unbroken is called egg tapping.
In egg tapping, each participant holds a hard-boiled egg and strikes it against another player’s egg. One end is usually tapped first, followed by the other end if both shells survive. The player whose egg remains intact continues, while the cracked egg is out of play. Rules vary by region and family.
The game is known by different names, including egg knocking and egg jarping. It is especially associated with Easter in parts of Europe, the Middle East and other communities where decorated or dyed eggs are part of the holiday.
Egg tapping is different from egg rolling, which involves sending an egg across a surface, and from an egg hunt, which involves finding hidden eggs. Its defining action is the direct collision between two eggs.