Related Clues:

• ___ off (gets lost)
• Office couple?
• Two of fifteen?
• Very bad grades
• Certain verbal 'bombs,' more politely
• The only grading letters that appear anywhere in this puzzle (other than the present clue)
• Daffy duo?
• Terrible grades
• Pair of ruffians?
• Flunking grades
• Fig leaf's outer edges?
• Forty percent of fifty?
• Pair of officers?
• Embarrassing marks
• Two out of fifty?