Noun
kid sister (plural kid sisters)
(informal) Synonym of younger sister
There are two kinds of cryptography in this world: cryptography that will stop your kid sister from reading your files, and cryptography that will stop major governments from reading your files. Bruce Schneier
In Blue Crush, we meet three Hawaiian surfers who work as hotel maids, live in a grotty rental, and are raising the kid sister of one of them. Despite this near-poverty, they look great; there is nothing like a tan and a bikini to overcome class distinctions. Roger Ebert
A succubus on the set. Strike that, the health-conscious kid sister made it two... succubuses. Succubusees? Succubi? Stupid Latin correspondence course. Jim Butcher
India is my kid sister. Salman Rushdie
Roberts discusses his battles with drug addiction, repairing his relationship with his kid sister, Julia Roberts, his long comeback, and what it’s like to work on 74 films in a single year. Source: Internet
Oh, and the kid sister Joanna, is a complete story stealer. Source: Internet