Definition of kid sister in English:

kid sister

noun

informal
  • One's younger sister.

    ‘if you weren't his kid sister I'd have given you a far harder time’
    • ‘Could it be possible that guys treat me like a kid sister because I treat them like big brothers?’
    • ‘Your kid sister found us, and that's why we had to move.’
    • ‘Coming along with her, in the junior section, was her kid sister, Sofia Kim, who had to be told the instructions in Korean.’
    • ‘Her brothers have always treated Julie like a strange, contrasting combination of a delicate kid sister who needs protecting, and a ‘regular joe’ who can fight with the best of them.’
    • ‘‘I practically raised my kid sister,’ he replied with a laugh.’
    • ‘Shala remembers a sweet-natured kid sister, nearly twice her size, who loved to squeeze her tight.’
    • ‘Finally, Holden sneaks into his parents' apartment to visit his kid sister Phoebe, who's about the only person he seems to be able to communicate with.’
    • ‘What made you think that my kid sister was a good person to work with on a project?’
    • ‘I like having a kid sister and I miss not having another younger sister or brother to look out for.’
    • ‘He made best friends with a crazy Southern Rhodesian pilot, went out to visit him after the war, and ended up marrying his kid sister.’
    • ‘I smiled at my kid sister through the rear-view mirror.’
    • ‘Dad's relationship with my kid sister wasn't getting any better.’
    • ‘Secondly, it really felt like I was listening to my kid sister's angsty response to high school heartbreak.’
    • ‘You guys did the right thing, and, at the end of the day, my kid sister's okay.’
    • ‘Rabbit lives in a trailer on the poor, predominantly black side of town with his kid sister, their mother and her redneck boyfriend.’
    • ‘I'm not entirely opposed to pounding on guys that try to hit on my kid sister.’
    • ‘The boys are all a few years older and treat their pint-size leader like a kid sister.’
    • ‘This time my kid sister Jan and her husband, who live in Texas, have had to face the agony of whether or not to move out, and decided it was better to join that terrifying exodus.’
    • ‘The plaintivenss of Ruth's can't-get-a-date plight is underlined by her kid sister's attractiveness to every member of the opposite sex.’
    • ‘She was his kid sister, and he had to watch out for her.’