Whenever someone does somethng embarassing or stupid then ''PAT!'' is shouted out in order to cause the person further embarassment.
First used in Glasgow, Scotland. Now a common phrase in Scottish mainlands.
In math class boy argues with the teacher
Teacher tells boy to sit down
Fustrated at losing arguement, boy storms out class
Fellow classmate shouts 'PAT!' just as he leaves class
Boy feels more embarassedThe end