Japanese DictionaryDefinition of ころがりこむ
- (v5m, vi) to roll in; to tumble into; to visit (esp. to stay overnight as an unwanted guest); to come to live with
硬貨が机の下に転がり込んだ。
A coin rolled under the desk. - to fall in one's way; to fall into one's lap
思いがけない大きな財産がころがりこんでくると信じることは、根も葉もないことだ。
To believe that an unexpected big fortune will come your way is to build a castle in Spain.