To be completely overwhelmed by your sex drive so much so that you cannot focus or do anything else until mastubation is complete. Often times young males may experience ants in pants up to 3 times consecutively.
Also known as Anty Panties.
Mum: Excuse me son, how about you do some study! Your exams are soon!
Hutz: Stfu im batting
Mum: Sounds like someone has a case of ants in pants
Hutz: I SAID STFU