Playing tricks or jokes on someone, usually intended to surprise or amuse them rather than harm them.
From 'prank' (a practical joke), possibly from earlier 'prank' meaning 'to dress up or show off.' The root origin is uncertain but may relate to German 'prank' (to show off).
April Fools' Day pranking is so popular that major companies now compete for the best corporate pranks—Google's 2004 Gmail announcement was thought to be an April Fools' joke because 1GB email seemed impossible back then! Technology companies now plan pranks a year in advance.
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