Related Clues:

• Fast partner
• Unlike a picnic?
• Not at all interesting
• Vexing
• Bor-r-r-ring
• Like some facts
• Bad, like luck
• Tough to figure out
• Strenuous
• Hardly fascinating
• ___ as a diamond
• Rock-like
• Kind of rock or candy
• Awfully dull
• Like a Saturday crossword