1. Jackassery generally associated with consumption of large amounts of alcohol. Usually involves more than one person acting foolish in the same manner as a circus clown would but to a much higher degree. 2. Saying stupid things after drinking too much that others laugh at one about.
1. Look at the way he is acting, his clownism is ridiculous!
2. Did you hear what she just said!? That was a clownism for sure!