The word "brickle" is an adjective that describes something that is not very flexible or elastic. When something is brickle, it is easy to crack, break, or snap. You can think of it like a dry stick or a piece of glass; if you try to bend them, they break easily.
While there are no specific idioms or phrasal verbs that directly include "brickle," you might encounter phrases like "walking on eggshells," which means to be very careful not to upset someone, similar to how you would handle something brickle.
"Brickle" describes something that breaks easily due to its lack of flexibility.