1. She flunked biology examination.

2. 2 Tony flunked chemistry last semester.

3. In my defense, I flunked biology.

4. Not'cause our ranks tanked, but'cause our friend flunked

5. You realize you're talking to a guy who flunked Allen key, right?

6. Jill is such a blockhead that the flunked every course as a freshman.

7. Synonyms for Cratered include failed, foundered, flopped, folded, bombed, tanked, flunked, collapsed, missed and flamed out