nayo-nayo
Weak, limp, and lacking firmness — a frail body or a spineless, indecisive attitude.
💡Scolding someone for being wishy-washy — 'Don't be so nayo-nayo!'
なよなよしないで、しゃきっとしなさい。
Stop being so nayo-nayo weak-kneed — stand up straight!
Don't be so ___ spineless — speak up for yourself.
○○しないで、しゃきっとしなさい。