Pronounced I-D-GAS Syndrome. not id-gas
Abbreviation for "I don't give a shit"
"I don't give a shit" syndrome is the vulgar term for senioritis and other times in a person's life when he or she does not care about the given task or topic.
Although it is mainly for seniors about to graduate college (or high school), it could be used by any student at the end of the semester, or others who are just not interested in the given scenario.
Student 1: "Thanks. I'm gonna need it. I have ID-GAS Syndrome."
Professor: What's that?
Student 1: "I don't give a shit syndrome".