1. Everybody blames me for my careless mistake.

2. A Blunder is a stupid or careless mistake

3. The professor lambasted me for my careless mistake.

4. A gross, stupid, or careless mistake: That's your second Blunder this morning.

5. Blunder definition, a gross, stupid, or careless mistake: That's your second Blunder this morning

6. This is the kind of careless mistake on which examiners love to pounce.

7. Blunder definition, a gross, stupid, or careless mistake: That's your second Blunder this morning