Asian F, n. — Green’s Dictionary of Slang

Asian F n.

[noted previously but widely popularized following its use as the title of ser. 3 ep. 3 of the TV series Glee (aired 4 Oct. 2011); a joke on the usual good grades achieved by Asian students]

(US campus) the grade of A-.

2008		Urban Dict. 24 Sept. 🌐 Asian F. A grade between 80 and 89%. Likewise, an Asian C is from 90-94% and an Asian B is from 95-99%. Only a grade of 100+ can be called an Asian A.
2012		C. Eble (ed.) UNC-CH Campus Sl. 2011.