Definition from Wiktionary, the free dictionary
Derived from not worth a dime.
- (idiomatic) An insignificant amount
- Why is he here? Nothing will change. At best, he'll make a dime's worth of difference.
1941, L.H. Robbins, The New York Times:
- But why, he asks, should a similarly rapt and adoring crowd bank up before a lighted wall niche containing nothing but a dime's worth of daffodils and a couple of sprays of forsythia in a blue dish?