english
1
general::
Benefits obtained in an evil manner or by dishonest means, as in They duped their senile uncle into leaving them a fortune and are now enjoying their ill-gotten gains. [Mid-1800s]
American Heritage Idioms
2
general::
Phrase(s): ill-gotten gains money or other possessions acquired in a dishonest or illegal fashion. • Bill cheated at cards and is now living on his ill-gotten gains. • Mary is enjoying her ill-gotten gains. She deceived an old lady into leaving her $5,000 in her will.
McGrawhill's American Idioms And Phrasal Verbs