Here’s the 411 on slang in interviews.
Never use slang in an interview. You should speak to an interviewer just as you would to a business colleague or even a boss. That means you must sound polished and professional.
Also, the interviewer (who may not be as cool as you are) may have no idea what you’re saying when you use slang.
Last, never, EVER, use profanity in an interview. There’s simply no place for it.