As always, Lois McMaster Bujold (lmbujold) coined the phrase "a metaphor gone metastatic" in A Civil Campaign, in the musings of a man with multiple personalities.
More recently (tonight, in fact), agent139 provoked what would have been a major soda-spew, had only my mouth been armed, by writing:
my hip-hop saying for the evening:That makes me feel all warm and fuzzy, y'know?
keep'n it theoretical.
(as opposed to keep'n it real. i drop idealist metaphysics non-stop, yeaaah.)