Achieved when a crowd of people at a comedy club, theatre, park, or dwelling, are all infected with the same intelligent jokes which causes them to have uncontrollable, non-stop giggles.
The only way we're going to get through this pandemic is through Herd Hilarity. After alllaughter is the best medicine.
A version of the word hilarious which means hysterical or very funny. It is often referred to as the older brother of hilarious. It basically means very hilarious.