2 definition by Caity and JayJay

Top Definition
Post NYSF Depression. The heart breaking, and gut renching despression that strikes NYSF students on their return home.
Person#1; How are you feeling today??

Person#2; Oh, I have a terrible case of PNYSFD! :(

Person#1; ............. Check your program! :D
by Caity and JayJay January 13, 2012

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An incredibly amazing person that is, or has attended the Australian National Youth Science Forum. An NYSFer is highly intelligent, and is ridiculously fun to be around.
Person#1; who are those crazy people over there chanting and thrusting??

Person#2; Oh, they're NYSFers :D
by Caity and JayJay January 13, 2012

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