Skip to main content
old boy

old boy

83 8.0
A friendly way to call a man you know well
  • noun
  • UK
: amigo
  • Listen to me, old boy.

Yeah, but it wasn't just like, I'm sorry, old boy, you're being put down, girl.

Examples

Synonyms

boy
vsold boy
  • Informal
∞ 7.4

An informal, friendly way to refer to a group of friends who are men

focuses on long personal acquaintance rather than group reference
fellow
vsold boy
  • Informal
614 1.4

A man or boy you speak to in a friendly way

is used specifically among men who have known each other long
old man
vsold boy
  • Informal
244 2.7

A friendly way to call a man often older or in charge

is used by long-acquainted men rather than stressing age or rank
gent
vsold boy
  • Archaic
68 8.0

A man who is polite or has good manners

is a familiar long-standing address among peers rather than polite formality
old chap
vsold boy
  • UK
16 8.2

A friendly name people use for an older man in Britain

focuses on long familiarity among peers rather than age or region
bucko
vsold boy
  • Archaic
9 8.8

A friendly, informal name used for a man you know well

signals long-familiar male address rather than playful slang alone
chico
vsold boy
  • Informal
6 8.4

A man or boy you call in a friendly way

is specifically used among long-known men rather than general address
brah
vsold boy
  • Australian
6 9.9

An informal word for a guy friend, like bro

carries older, long-standing friendly use among men rather than youth slang
chappy
vsold boy
  • UK
5 9.5

A friendly word for a man or boy

implies long mutual acquaintance rather than casual friendly calling
gaffer
vsold boy
  • Archaic
1 9.1

An old man people speak about in a friendly or polite way

emphasizes long mutual familiarity among men rather than age respect
old bud
vsold boy
  • Informal
1 8.1

A friend you have known for a long time, often since childhood

is used by men who have known each other for a long time
ould fella
vsold boy
  • Irish
1 9.9

A friendly name for an old man used in Ireland

is a general long-familiar male address not limited to that region

Antonyms

625 1.0

A person you do not know

How Familiar

old boy
  • UK
83 8.0
pal
  • Informal
∞ 1.0
Mr
  • UK
∞ 1.0
sir
  • Formal
∞ 1.0

Surface Forms

old boy singular
old boys plural

Morphology

old + boy

The constituent 'old' can be interpreted as 'former' and 'boy' as a male person, so a learner could infer 'a man who used to be a pupil'. However, the phrase is a conventional British institutional label (often implying alumni of certain private schools) and relies on a colloquial use of 'boy' for adults, so the exact social nuance is not fully predictable without exposure.

Etymology

Old boy began as a friendly way for men who had known each other a long time to speak to one another. old shows the long history and boy is a playful, friendly word, so it became a warm form of address like 'How have you been, old boy?'.