Related Clues:
- Ready for the rubber room
- Not exactly insightful
- Lacking in insight
- Like angles between 90 and 180 degrees
- Half-baked
- Round the bend
- Outrageous
- Irreparably cracked
- Utterly ridiculous
- Rather dense
- Off the deep end
- Greater than 90 degrees, as an angle
- Slow to catch on
- Beyond daring
- Not playing with a full deck