blow in verb 3blow-in noun 1forms 5 verb3 •(slang) To unexpectedly and casually arrive.[Patrick Star is attempting to sweep the floor of the Krusty Krab with the wrong end of the broom] Hey pal, you just blow in from Stupid Town? — 2000 •(slang) To waste large amounts of something (typically money); to squander. •To activate a blast furnace by eliminating moisture and then igniting a large amount of fuel. blow-in noun1 •(Australia, Ireland) Someone who has only recently arrived in an area or community; a newcomer.This had been her local when she worked in Central. All the waitresses knew her by name. Now she was a blow-in. — 2022 formsblew in · blown in · blowing in · blows in · blow-ins