The idiom "think outside the box" means to approach a problem or situation in an unconventional or innovative way. It suggests stepping out of one's comfort zone and considering new ideas or perspectives that may not have been previously considered.

A "dry run" is a hypothetical or simulated trial of something to test its feasibility or effectiveness before actually implementing it. It involves rehearsing the steps involved in a process without any real consequences or risks.

The idiom "all is fair in love and war" means that during times of intense emotion or conflict, people tend to behave more aggressively and without restraint. In other words, when the stakes are high, people are willing to do things they wouldn't normally do.

The idiom "hang up" means to disconnect a telephone or end a call, especially abruptly or rudely. It can also mean to terminate an agreement, relationship, or engagement. The figurative meaning of the idiom is to end something suddenly and unexpectedly.

The idiom "camp follower" refers to someone who is not directly connected to a group or organization, but follows them around or has a close association with them.