"Be in for something" is an idiomatic expression that means to be in a situation that is likely to result in a particular outcome, typically a negative one. There are a variety of synonyms that can be used to convey the same message, including "bracing oneself," "preparing for," "anticipating," "expecting," and "awaiting." These words all imply a sense of readiness for a potential difficulty or challenge that lies ahead. Other related expressions that convey a similar tone include "steel oneself," "brace for impact," and "prepare for the worst." Whether used in everyday conversation or formal writing, these synonyms can help to convey a sense of foreboding or expectation around a possible outcome.