be knee-high to a grasshopper

US /bi ni haɪ tu ə ˈɡræsˌhɑpər/
UK /bi ni haɪ tu ə ˈɡræsˌhɑpər/
"be knee-high to a grasshopper" picture
1.

很小, 年幼

to be very small or young

:
I remember him when he used to be knee-high to a grasshopper.
我记得他那时还很小
My grandmother always tells stories about me when I was knee-high to a grasshopper.
我奶奶总是讲我小时候的故事。