Craic

Craic is a noun that refers to an enjoyable social activity, or a good time. 

Our word of the day began as the German word for crack. After it drifted into Old English, it meant ‘to make an explosive noise.’ In time, it took on its current meaning. Here’s an example of it:

The craic at Jeff’s house was the most fun I’ve had in years. His parties always were a blast.