Y.C.S.S. (Younger Cuter Sister/Sibling Syndrome)
When you have a younger sister/sibling that is better looking than you
Stacie is okay but have you seen her little sister Jessica? Stacie totally suffers from Y.C.S.S. (younger cuter sister/sibling syndrome)
Younger Sibling Syndrome
When a younger sibling constantly feels inferior to their older sibling.
there always compared to their sibling, it’s a clear case of Younger Sibling Syndrome