[UK] Spoken metasyntactic variable, to
indicate some text that is obvious from context, or which is already
known. If several words are to be replaced, blurgle may well be doubled or
tripled. “To look for something in several files use ‘grep
string blurgle blurgle’.” In each case, “blurgle
blurgle” would be understood to be replaced by the file you wished
to search. Compare mumble, sense 7.