A common saying or phrase, incorrectly spoken in a way that makes it unintelligible but still recognizable; or in general, a statement that technically makes sense but is otherwise ridiculous and sometimes self contradicting.

In a fraternity or sorority of the ethnic persuasion, an ism is defined as an individual that has the same position in line.

Someone who does a distinctive specified thing so much, that they are now notorious for it. They are generally referred as a "their name"-ism.

Chronic marijuana.

1. one's unique mannerisms

in greek societys, someone with the same line number are considered isms.
You can also be in the same class as well as ism and therefore be called "class ism". Or additionally also be syands and be "class ism syands".

suffix meaning something the root said. only used with names of people or groups of people.