えびたい

えびたい【海老鯛】

an instance of a large return that is out of proportion to the minor risk or favor that occasioned it; getting sth back double.

●読みたいという雑誌を持って行ったら, 極上のワインをごちそうになり, エビ鯛になってしまった. When I took him the book he'd said he wanted to read, he treated me to some great wine―a disproportionate reward for the small effort on my part.

●電車賃出すから映画とディナーをおごれって? まるでエビ鯛じゃないか. You'll pay the train fare, so you want me to stand dinner and a movie? You don't think you're asking a bit much?