fluff

FLUFF noun

[ U ] uk/flʌf/ us
small, loose bits of wool or other soft material

пух, ворс
There's a piece of fluff on your jacket.
fluff verb [ T ]
 informal uk/flʌf/ us
to fail to do something successfully

допускать промах, оплошность
I had a great chance to score but I fluff ed it. Фразовые глаголы fluff sth out/up