derived from two pence
indicates what something is (or isn't) worth, it refers to the pre decimalisation British currency £SD (pounds shillings pence)

used to be 2d (pennies).

similar in usage to the US 2 cents
I don't give a tuppeny ha'porth about your opinion

or if you comment on something and don't expect it to be taken to seriously you might sign off as.."just my tuppeny ha'porth"
by MarkWJames February 27, 2008
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