Why do people chant "ole ole ole ole" at Flogging Molly and Dropkick Concernts?

Question

I always here the chant before the concernts begin, but am not sure why.

Answer 1

Their music is heavily influenced by such bands as The Pogues, and has many references to the Roman Catholic Church, their biggest concert was held in Madrid, Spain wher Ole is the cheering way. The band used Ole Ole once in one of their songs and their fans like to cheer them using it.