Noun
(UK, dated) Affectionate term of address for a man.
Synonym: old fellow
(UK, colloquial) The penis.
Synonym: old fellow
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. Halldór Laxness