He's learning the ropes far more rapidly than his boyish manner suggests, though.

Out of it tumbled a tall young man with fair hair and an eager boyish manner.

That and his boyish, laughing manner had attracted her to him from the first.

The deceptively boyish manner which masked a startling clarity of thought.

It was hard to reconcile his boyish, eager manner with the soul of a criminal.

At forty-five, he appeared ten years younger than his age, and he had a boyish manner.

"That's what drives me," he said, his manner and appearance unusually boyish at 46.

However he is flawed by his "boyish and impulsive" manner.

"Here's a live one," she thought, attracted to his shy, boyish manner.

He stamped his foot upon the ground in his boyish insolent manner.