a few spanners short of a tool box vs one fry short of a Happy Meal

a few spanners short of a tool box

one fry short of a Happy Meal

adj

  • stupid, retarded, slow 

  • mad, deranged, insane 

How often have the words a few spanners short of a tool box and one fry short of a Happy Meal occurred in a corpus of books? (source: Google Ngram Viewer )