be on first name terms (with somebody)British EnglishBrE, be on a first name basis American EnglishKNOW somebody to know someone well enough to call them by their first name 〔因熟悉某人而〕直呼其名，（与某人）以名相称be on first name terms (with somebody)• Voice over Even the governor is on first name terms with the inmates, although the staff still keep a respectful distance.
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