It's a common abbreviation used in a casual setting, especially within the context of school or college life.
Here's how the abbreviation likely came about:
* Phonetic Similarity: The sounds "fresh" and "frosh" are very similar, making it a natural shortening.
* Common Practice: Shortening words is a common practice in English, particularly for words that are frequently used. Think of "pro" for "professional" or "doc" for "doctor."
So, the next time you hear someone talking about "frosh" at a school event, you'll know it's just a friendly nickname for the first-year students!