red cent
US /rɛd sɛnt/
UK /rɛd sɛnt/

1.
一分錢, 絲毫
a very small amount of money; nothing at all (used in negative contexts)
:
•
I wouldn't give him a red cent for his advice.
我不會為他的建議付一分錢。
•
After all that work, he didn't earn a red cent.
做了那麼多工作,他沒賺到一分錢。