Slang: Quick buck

Definition: Fast and easy profit; money made in a short period of time.


Example: 


1) He doesn't care about you -- all he wants is to make a quick buck.


2) Are you interested in making a long-term investment or in turning a quick buck?


Etymology: 'Quick' means fast, and 'buck' is slang for a dollar bill.


Synonyms: easy money




fonte: www.peakenglish.com