DOC
n. countable A2 Elementary US //ˈdɑk// UK //dˈɒk// doc
n. a short, friendly name for a doctor. You might use it when talking to a doctor you know well or when joking around.
n. a colloquial abbreviation for a doctor. Informal in register; frequently used as a direct address or a nickname.
What's the news, doc?
He decided to visit the doc after his cough didn't go away for a week.
While the formal title is preferred in clinical reports, many patients refer to their long-term family physician as 'doc' to signal a sense of trust and familiarity.
Usage
Often used as a vocative to address a medical professional directly.