scram

"Scram" is a lively slang word that became common in American English in the early 20th century. At its heart, it means to leave at once and fast, often to avoid trouble or simply to get out of the way. It is much stronger than "leave" because it suggests sudden movement and often a bit of annoyance. You might tell someone to "scram" if they are hanging around your porch, or warn them to scram if a situation is starting to look dangerous.

It is important to distinguish "scram" from the similar-sounding "scrap." You "scrap" a plan when you cancel it, but you "scram" when you rush away from a place. The key idea is movement away from a location, usually in a hurry. The word may be connected to other English words about quick movement, but its exact origin is uncertain, so the safest meaning to hold onto is simple: someone needs to get out, and fast.

Beyond everyday slang, the word also has a special technical use in nuclear engineering. In that field, a "SCRAM" is an emergency shutdown of a reactor. That use is separate from the everyday slang meaning, but both share the same sense of sudden action when something cannot continue as it is. Whether it is a person rushing off or a reactor being shut down at once, the word points to a quick and urgent stop or exit.