lanky person; beanpole; lamppost
Colloquial noun for a very tall, thin person; often used teasingly or affectionately.
He's a beanpole and good at basketball.
noun which may take the genitive case particle 'no', na-adjective
Describes a person's build as tall and slender; can be used attributively with の or as a na-adjective.
A tall, thin man ducked through the door.
That kid has a lanky build, huh.
The origin is uncertain; it may be a mimetic word evoking a tall, thin shape, but the exact derivation is unclear.