It is a Nigerian slang word used to describe;
1: someone older than you

2: It can also be used to describe someone that is good at a particular thing.
3: It can be used to describe someone that is highly respected in the community.
1: Senior man I dey greet o..This means good day mr.
2: Kelechi Iheanacho na senior man when e come to football..This means that Kelechi Iheanacho is a very talented footballer.

3: That senior man get money die..This means that man is very wealthy.
by Don_Ceezar April 27, 2021
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Senior man(snr man) is a Ghanaian slang, used on highly respected people or someone who is very good at something or doing something, which could be anything.
Oi David, this Senior man will give you a good run for your money.
by Man_like_Cecil _TWGT December 7, 2017
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A Nigerian slang used to insult a person with an abnormally small penis
That our boss henry is a senior man down there
by Harveyxyz September 7, 2021
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