えびでたいをつる

海老で鯛を釣る

to throw in a shrimp and pull out a whale; to use a sprat to catch a mackerel; to get big returns on a small investment

N3Expression
Expression, Godan verb (ru ending)
to throw in a shrimp and pull out a whaleto use a sprat to catch a mackerelto get big returns on a small investment