The deck originally refers to a pile of playing cards stacked in a random order.
When someone gets on a high horse, they tend to appear haughty and to speak in a manner that is condescending, arrogant and self-righteous.
When we say someone knows how to make a person tick, we mean to say they understand that person really well.
When we describe someone as dyed in the wool, we mean to say they're stubborn and unchangeable, steadfast in their belief or behavior.
If a person is described as off the wall, then this person is irregular, out of control, unpredictable.
Third rail refers to something off limits. It is a topic no-one wants to touch because touching it means doom and gloom.
When we talk about the cut and thrust of something, we mean to address the exciting and challenging part of it.
People who have the whip hand have power over others in a particular situation.
When politicians are launching trial balloons, they’re really saying they plan to to gauge and measure public opinion.
Fight or flight refers to the animal instinct to make a quick decision in a moment of danger.