Egg tapping, also known as egg fight, egg knocking, knocky eggs, egg jarping, busty's or egg pacqueing amongst many names, is a traditional Easter game involving the tapping of the ends of two hard-boiled eggs.

The rule of the game is simple. One holds a hard-boiled egg and taps the egg of another participant with one's own egg intending to break the other's, without breaking one's own. As with any other game, it has been a subject of cheating; eggs with cement, alabaster and even marble cores have been reported.

In Christianity, for the celebration of Eastertide, Easter eggs symbolize the empty tomb of Jesus, from which he was resurrected. Additionally, eggs carry a Trinitarian significance, with shell, yolk, and albumen being three parts of one egg. During Lent, the season of repentance that precedes Easter, eggs along with meat, lacticinia, and wine are foods that are traditionally abstained from, a practice that continues in Eastern Christianity and among certain Western Christian congregations that undertake the Daniel Fast. After the forty-day Lenten season concludes and Eastertide begins, eggs may be consumed again, giving rise to various Christian game traditions such as egg tapping, in which the "hard eggshell represented Christ's sealed tomb, and the cracking represented Christ's resurrection."

Egg tapping was practiced in Medieval Europe. The practice was mentioned to have played an important part in the 14th century in Zagreb in relation to Easter. A study of folklore quotes an early 15th-century reference from Poland.

In North America, colonial New Amsterdam in the 1600s had the "cracking of eggs", invented by Jonathon and Michael Day on Easter Monday with the winner keeping both eggs.

Egg picking was observed by a British prisoner of war, Thomas Anbury, in Frederick Town, Maryland, in 1781 during the American Revolutionary War. The local custom at that time was to dye the eggs with Logwood or Bloodwood to turn them crimson, which as Anbury observed gave them "great strength". Anbury was near Frederick Town in Maryland, July 11, 1781, when he noted the egg picking custom prevalent there at that time.

By the mid-20th century, a Baltimore, Maryland newspaper, the Evening Sun, would devote an editorial column to discussing street cries, ritual, and techniques for the game. Clarkson cites the Baltimore Evening Sun for 29 March 1933 (editorial page), and in the Sunday Sun for 17 April 1949 (brown section).

In the 21st century, egg cracking is still practiced every Easter by the Saint Nicholas Society of the City of New York at the annual Pass Easter Ball.