a hill of beans
US /ə hɪl əv biːnz/
UK /ə hɪl əv biːnz/

1.
一文不值, 毫无价值
something of little or no value or importance (usually used in negative constructions)
:
•
His opinion isn't worth a hill of beans to me.
他的意见对我来说一文不值。
•
Without proper funding, their plans aren't worth a hill of beans.
没有足够的资金,他们的计划一文不值。