Some prefer Old Catholic or Independent Catholic or IC/OC, to use both. Some prefer Independent Sacramental Movement, ISM for short. I propose a new abbreviation to use:
E I E I O
Here's why:
Arnold Mathew had a church E I E I O
And in that church he made many bishops E I E I O
With a schism here with a schism there
Here a schism there a schism
Everywhere a schism schism
Arnold Mathew had a church E I E I O
Please feel free to submit additional verses in the comments.