agreeable fellow; pleasant man
Describes a man who is cheerful, easygoing, and pleasant to be around. Somewhat literary or old-fashioned; not common in everyday conversation.
He is an agreeable fellow liked by everyone.
Compound of 快 (kai, 'pleasant') and 男子 (danshi, 'man'). The exact origin is uncertain; it appears to be a coined term rather than a classical word.