An obligation that must be carried out by a nerd (a person whose IQ exceeds his weight).Usually things like reading a dictionary or an entire encyclopedia or anatomy book. Or even worse doing vector calculus just for fun. Most of them do it out of respect or some profound sense of duty
Eg: holy crap i almost forgot my nerdbligation to complete memorizing this encyclopedia about keyboards
Eg: Ahhh, i cant sit here partying i have a nerdbligation to to complete my mathematics homework instead of hopelessly trying to hit on all these chicks.