Slouch (Noun)

An incompetent person; usually used in negative constructions; "he's no slouch when it comes to baseball".

Nouns denoting people.

He's no slouch when it comes to solving complex math problems.
She may look laid-back, but she's no slouch in the business world.
Don't underestimate him, he's no slouch on the tennis court.
He's no slouch when it comes to playing the guitar, having practiced for years.
Despite his carefree attitude, he's no slouch when it comes to academic achievement.

A stooping carriage in standing and walking.

Nouns denoting attributes of people and objects.

She walked into the room with a noticeable slouch, her shoulders rolled forward and her head down.
The slouch in his posture made him appear even shorter than he actually was.
After years of sitting at a desk, she had developed a permanent slouch that was starting to affect her back.
The doctor told her that her slouch was putting unnecessary strain on her neck and shoulders.
The boy's slouch made him almost invisible in the crowded hallway, he blended in with the lockers.