호박이 넝쿨째 굴러 들어왔어요 · 호박이 넝쿨째 굴러 들어온 셈이에요
to have great luck fall into one's lap, to get a windfall (lit. a pumpkin rolls in, vine and all)
Example
좋은 사위를 얻어서 호박이 넝쿨째 굴러 들어온 기분이에요.
Getting such a wonderful son-in-law feels like a huge stroke of luck.
Word parts
Not just one pumpkin but the whole vine (넝쿨째), with more pumpkins on it, rolls into your house.
Good to know
Pronounced [호바기 넝쿨째 굴러 드러오다]. Used for big, unexpected good fortune, classically when gaining a wonderful new family member or a great deal.