The boss called him out for his blunders.

Tuesday evening!" I exclaimed. "And this is Thursday morning. Why didn't you go down yesterday?" "Because I made a blunder, my dear Watson--which is, I am afraid, a more common occurrence than any one would think who only knew me through your memoirs."

What a blunder!

The blundering fool!" Holmes said, bitterly, as we drove back to our lodgings. "Just to think of his having such an incomparable bit of good luck, and not taking advantage of it."

What was she doing when she made that blunder?

God bless you!" he cried. "You have saved my honour." "Well, my own was at stake, you know," said Holmes. "I assure you it is just as hateful to me to fail in a case as it can be to you to blunder over a commission."

Thanks to a bureaucratic blunder, we don't have access to the building anymore.

He mixes up words, so his letter is full of blunders.

As a result of his carelessness, he made a serious blunder.

She's guilty of a grave blunder.