The correct spelling for the phrase "study at sarcastic" is actually "study it, sarcastic." The phonetic transcription for this phrase is /ˈstʌdi ɪt, sɑːˈkæstɪk/. This phrase is often used to express a sarcastic or ironic tone when referring to someone's ability to learn or comprehend a topic. It is important to use proper spelling and pronunciation in order to effectively communicate sarcasm or irony in writing or speech.