1. make a killing - Verb
2. make a killing - Phrase
make a killing (third-person singular simple present makes a killing, present participle making a killing, simple past and past participle made a killing)
(idiomatic) To win or earn a large amount of money.
Someone's gonna make a killing on the Rorschach mask business. Source: Internet
This month the borough prospective buyers of an 1898 corner tenement in Kreuzberg over hopes that they might make a killing on the building’s purchase. Source: Internet
It’s too bad a lot of them are catholic, they could make a killing in the porn industry with those monsters. Source: Internet
It might get to the point that it could play every popular format(it almost already does), and then they could publish it and make a killing. Source: Internet
I would copyright that idea while you still can because I bet someone could make a killing off of it. Source: Internet