1. adjective Totally worthless; lazy, untrustworthy, or incorrigible; good-for-nothing. (Short for "no-account.") That no-count son-in-law of mine has gotten himself arrested for public drunkenness again. That's the third time in as many months!

2. noun A worthless, lazy, or incorrigible person; a ne'er-do-well. It grieves me each time my son comes home with a new no-count of a boyfriend, but it's not for me to choose whom he dates.