Related Clues:

• Immovable type
• Undemonstrative to the max
• Unloaded?
• ___ as a judge
• Not loaded
• Dispassionate person
• Seneca, for one
• Unemotional thinker
• Devoid of emotion
• Hard to rattle
• Showing little emotion
• Not even tipsy
• Not easily flapped
• Betraying no emotion
• Giving nothing away, in a way