A few I've acquired over the years.

• "At this point, you can only impress me."
• "My opinion of you can only go up from here"
• "The bar was on the ground and you brought a shovel."
• Unencumbered by the thought process.
• "You're the reason we have warning labels."
• "They only got two brain cells and both of them are fighting for third place."
• "It's impossible to underestimate you."
• "If you were half as smart as you think you are, you’d be twice as smart as you really are."
• "If you ever had a clever thought, it died alone and afraid."
• "They never open their mouths without subtracting from the sum of human knowledge."
• "He can compress the most words into the smallest idea of any man I know." - Abraham Lincoln
• "May I ask what's on your mind, if you'll forgive the overstatement?"
• "You could hide your own Easter eggs."
• "I can explain it again, if you'd like, but I can't understand for you."
• "He is a modest man with much to be modest about."
• "I would agree with you but then we would both be wrong"