①If you slither somewhere, you slide along in an uneven way.【v.(摇摇晃晃地)滑行，滑动】
②If an animal such as a snake slithers, it moves along in a curving way.【v.(蛇等)蜿蜒而行】
①Robert lost his footing and slithered down the bank.
②The snake slithered into the water.
Romain Gary的小说 Promise at Dawn 也出现了这个表达：
to spend money on something, especially when you do not want to.
fork out on/for
①They will fork outfor expensive coverage instead.
②Those who went to ten different places, by contrast, forked out 1,249.
关于“付钱”，之前也介绍过这么一个短语：spring for 【to pay for someone else's share of something.】
I'll spring for dinner tonight.
shell out （for）为…花费一大笔钱 【to spend a lot of money on something】
You won't have to shell out a fortune for it.
run to 支付得起;有钱购买 【If you cannot run to a particular item, you cannot afford to buy it or pay for it.】
If you can't run to champagne, buy sparkling wine.