At any rate, if the left-handed monkey wrench is a joke, a lot of other tools, including the piano, are real concerns.

This is not, I assure you, the left-handed monkey wrench of practical jokedom but serious business.

You can't tell a left-handed monkey wrench from a reaction engine, yet you ask me for blue prints of a space ship.

I tell you, there is a surfeit of left-handed monkey wrenches in the world compared to the supply of worthwhile students.

She looked the part of the sacrificial goat, the constant butt, believer in left-handed monkey wrenches, perpetual foul-up, and she was.

Finally, in the 1920s, some real left-handed monkey wrenches in one of these mystic lodges recruited Adolph Hitler, and he not only read the book backward, like all of them, but insisted on believing it was the story of the exterior, physical universe.