Related Clues:

• Like a .250 batting average
• Just adequate
• Not great, not terrible
• Just 'eh'
• Not too awful
• "Less than stellar"
• Nothing to get excited about
• "Nothing to write home about"
• Comme ci, comme ça
• Only okay
• Not great, but not awful either
• Neither terrible nor great
• Only OK
• Not great or awful
• Evoking a 'meh'