cash stuffing noun [C]
/ˈkæʃ ˌstʌf.ɪŋ/
the practice of saving cash in a different envelope for each type of bill or purchase

Inspired by Tik Tok influencers, one money trend that seems new, but is actually a throwback to simpler times, is “cash stuffing.” It’s pretty much what it sounds like: dividing up your income into physical envelopes marked for different expense categories and stuffing them with money. “Cash stuffing is a financial strategy that involves saving cash instead of investing it in order to best inflation,” says Harry Turner from an investing and trading education website.
[gobankingrates.com, 16 May 2022]

hypermiling noun [U]
UK /ˈhaɪ.pəˌmaɪ.lɪŋ/ US /ˈhaɪ.pɚˌmaɪ.lɪŋ/
a way of driving that uses various techniques to minimise the amount of fuel used

Some motoring experts have highlighted hypermiling as being one of the key resources in helping to combat the sharp rise in fuel costs. In some instances, using simple hypermiling techniques can help cut petrol and diesel usage by up to 40 percent.
[dailypost.co.uk, 8 June 2022]

frugaller noun [C]
UK /ˈfruː.gəl.əʳ/ US /ˈfruː.gəl.ɚ/
someone who tries very hard to avoid wasting food or other resources and spends as little money as possible

She stores carrots in water so they don’t go bendy, and she puts kitchen roll in the salad bag to stop leaves drooping. She also plans meals, so never buys something she already has. Some extreme frugallers take this one step further by keeping inventory lists. This means they can be confident they have supplies to fall back on if an unexpected bill comes in.
[theguardian.com, 4 June 2022]

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