halfpennyworth means As much as could be bought for a halfpenny (pre- or post-decimalisation). Lexicurio rates it Sui generis — a strength score of 90 out of 100.
noun
- As much as could be bought for a halfpenny (pre- or post-decimalisation).
- A negligible amount.“he's never been a ha'p'orth of bother”
- One's opinion or thoughts on a matter.