A mispronunciation of coffee. Term popularized by a famed Mathematician who prefers to remain anonymous. The Mathematician in question is known for his unquenchable desire for black corfee and rejection of Mocha and other "cheap thrills".
S/he also operates a very famous tuition center specializing in selling corfee and giving Mathematics tuition. Favourite subjects include Trigonometry and Calculus.
Corfee rox come to my tuition center plz