red cent
US /rɛd sɛnt/
UK /rɛd sɛnt/

1.
一分钱, 丝毫
a very small amount of money; nothing at all (used in negative contexts)
:
•
I wouldn't give him a red cent for his advice.
我不会为他的建议付一分钱。
•
After all that work, he didn't earn a red cent.
做了那么多工作,他没赚到一分钱。