Imagine a large pot of money that has been collected for one purpose — tax money, fees from customers, a licence fee, money raised for a charity. Top-slicing means taking a piece off the top of that pot before it is shared out, and spending that piece on something else. The picture is a cake: you cut a slice off the top first, and everyone shares what is left. It is a money word, not an everyday one. You meet it in news about government budgets, public services, schools, and broadcasting — for example, when part of a television licence fee is taken away to pay for something other than the programmes it was collected for. The word carries a quiet complaint inside it. People who like the plan say 'funding'; people who dislike it say 'top-slicing', because the word makes you see money being removed from what it was meant for. It is mainly British. It works as a noun ('the top-slicing of the fund') and as a verb ('they top-sliced the budget'). There is also a separate, more technical use in British tax on some investments, where a gain is spread over several years to work out the tax — that one is a specialist term you can safely leave alone.