The correct spelling of the phrase "rushed up on" is "brushed up on." The sound "br" is represented by the phonetic symbol /br/, followed by the sound "uh" represented by /ʌ/. The sound "sh" is represented by /ʃ/, followed by the sound "t" represented by /t/. The final three letters "ed" represent the past tense of the verb, and are pronounced with a /d/ sound. Therefore, the correct phonetic transcription of the word is /brʌʃt ʌp ɒn/.
"Rushed up on" is an informal phrase that is often used to describe the act of quickly acquiring or refreshing one's knowledge or understanding of a particular subject or skill. This phrase implies a sense of urgency or haste in the process of gaining knowledge.
When someone says they "rushed up on" a topic, it means they dedicated a limited amount of time to study or review the subject before needing to utilize that information. This could involve skimming through relevant materials, quickly reading summaries, or reviewing key points. The intended purpose is to quickly gain enough understanding or competence in the subject matter to successfully perform a specific task or engage in a conversation.
The phrase "rushed up on" can also convey a sense of informality or casualness, suggesting that the focus might be on gaining enough knowledge to be proficient rather than mastering a subject in its entirety. It is often used in situations where time constraints, immediate action, or a sudden need for knowledge arise.
In summary, "rushed up on" is an expression used to describe the act of rapidly acquiring or refreshing knowledge on a particular topic or skill. It conveys a sense of urgency and informal learning, often associated with quickly gaining enough understanding to effectively perform a task or engage in a conversation.