Sometimes I wonder about the origins of phrases and expressions. Word salad, for example. Sure, it means spitting out a jumble of incoherent words, but really, that's not akin to an actual salad. Some people are pretty darn picky about their salads. That's why there's so many of them, with recipes made, remade, re-imagined, subverted... And it can be somewhat intricate to ensure proper flavour.
Really, word salad should akin to measurements and values just like any other recipe. Would an adjective be worth a crouton? A past participle a chopped carrot? Proper noun a leaf of lettuce? Split infinitive? That's the blue cheese. Get that out of here.