noun phrase. An anger so deep it could only arise from the bowels or the punctuationological sciences.
Related terms: word-rage-free.
Real citation: "Colon rage"
(Geoffrey K. Pullum, March 24, 2008, Language Log, http://itre.cis.upenn.edu/~myl/languagelog/archives/005493.html)
Made-up citation: "Don't fear colon rage: Don't even rage against colon rage. Breathe deeply whilst I fetch your slippers and a linguistic laxative."