The Flappening was a term used to describe the possibility of Litecoin (LTC) gaining a higher market capitalization than Bitcoin Cash (BCH). The term was created by Charlie Lee, the founder of Litecoin in early 2018. Both Litecoin and Bitcoin Cash are forks of the Bitcoin network that intend to improve the speed and scalability of payments.

Is the flappening different from the flippening?

The ‘Flappening’ is meant to be a playful reference to the ‘Flippening’ which is a term members of the Ethereum (ETH) community use to describe Ethereum hypothetically passing Bitcoin (BTC) in market cap one day.

Has the flappening already occurred?

Yes, on December 14th, 2018 Litecoin officially passed Bitcoin Cash in total market cap. This is as opposed to the Flippening (Ethereum passing Bitcoin), which has not occurred to date.