big sis

Elder female sibling

Big sis is an informal term for an older sister, used both as a direct address and a reference: Hey, big sis, can I borrow your car?

It extends to any older female friend or mentor who takes on a sisterly role, particularly in contexts like Big Brothers Big Sisters programs.

The term carries warmth and familiarity.

Related

bossy · mentor · hand-me-downs · sharing · bedroom · rivalry · confidant · braids · advice · tattletale · role model · babysitter · sibling bond · annoying · secrets · fights · closeness · childhood

Opposites
birth order/sibling hierarchy

big sisbaby sister

Younger female sibling

kid sister · little sister · younger sister · baby of the family · kid brother

gender of sibling

big sisbig bro

Male sibling, born earlier

big brother · older brother · elder brother

sibling vs. non-sibling

big sisonly child

Person without siblings

mom · mother · daughter

Family

big, sis, bigger, biggest, sister, sisters, sisterly, sisterhood

Familiarity
Top 100,000
Profile
Known to kids · Used worldwide · Timeless · Concrete · Positive · Everyday, not technical · Rated G