old fellow
Noun
Meaning
(UK, dated) Synonym of old chap (“affectionate term of address for a man”)
(UK, colloquial) Synonym of old chap (“the penis”)
Source: en.wiktionary.orgSynonyms
Examples
When I was young, the old regarded me as an outrageous young fellow, and now that I'm old the young regard me as an outrageous old fellow.
I gathered that the old fellow suffers from some advanced form of senile dementia, and so perhaps his analysis is not totally accurate.
I was hoping the bishop would be coming himself. He's a terribly agreeable old chap. I always find it so enjoyable to blether with the old fellow. We don't agree about anything. But everything depends on agreeing to disagree.
There was no last animal I treated. When young farm lads started to help me over the gate into a field or a pigpen, to make sure the old fellow wouldn't fall, I started to consider retiring.
He's enormously rich and very generous, and the most learned old fellow in Britain."
The old fellow held the radish up high by its tail and inspected it.