Left handed monkey wrench noun
A monkey wrench has no left-handed or right-handed versions because it is symmetrical.
Used to refer to an imaginary tool, so it is often used to make fun of someone who is a newcomer or new to a field.
Go find me a left handed monkey wrench. Maybe it's in the toolbox.
Are you looking for a left handed monkey wrench, my dear? It does not exist. Dad is just teasing you.
This phrase emphasize that Christmas takes place once a year time, so you should grab this chance to indulge yourself and be good to others.
I've eaten a little more than usual as today is Christmas and Christmas comes but once a year, right?