Spilling the beans (or rather "spill" the beans) means "to let on"...and is thought to perhaps have been derived from the ancient Greek practice of voting where black and white beans were used to show for whom or what you were voting in favor of. (pg 143-144)The cat's pajamas first came into use in the 1920's (explaining the reason why it may be more familiar to YA readers right now with this era being rather popular at the moment) and is said to describe something of supreme quality or highest caliber. (pg 41-42)
QUICK NOTE...Update: 2/19/19
Still working through things. We were right in the path of Hurricane Michael (like so many others), and while the family is safe (pups, and parents), the house didn't fair as well. Baby steps back into the blogging world and started to grow, so you know, a post here, a post there, and away we go! Hope you stay along for the ride!