A mistake caused by stupidity or ignorance, rather than by accident. Usually occurs when the person has full knowledge that the action taken is a mistake.
I gave my girlfriend a yeast infection by going A to V. Such a mitztake!
It was a mitztake smoking that blunt before going to bed
When you have to pee in a movie but don’t want to miss anything, and must do the following mental equation: will the amount I have to pee cause enough discomfort to diminish my attention capacity for the remainder of the movie to an extent which is greater than the amount of the movie I would miss by making a mad dash to the restroom.
I saw Satantango last night, wonderful film but by the 5th hour I had to start doing pee calculus.