4 definitions by im
by im April 14, 2003
by im March 30, 2005
by im March 30, 2005
A ISR is an In School Relationship. Strictly a relationship where is taken place in school, usually consists of the grades 4-8. These types of relationships, do not go on dates, do not kiss, or anything of that real couples do.
by im December 18, 2016

