do in

{v.}, {slang} 1. To ruin; destroy. * /Mr. Smith's business was done in by a fire that burned down his store./ 2a. To kill; murder. * /The poor man was done in by two gangsters who ran away after the crime./ 2b. To make tired; exhaust. * /The boys were done in after their long hike./ Syn.: WEAR OUT(2). 3. To cheat; swindle. * /Mr. Jones was done in by two men who claimed to be collecting money for orphans and widows./