PJs

noun[plural only]2

1. •
   (informal) pajamas; pyjamas
2. •
   (US, slang) Initialism of projects (“urban housing developments for people with low incomes”).

   • We lived in the PJs, that's what we called the projects. It was integrated. The people next door were white, and there weren't that many blacks […] — 1996

noun1

1. •
   Initialism of Peutz-Jeghers syndrome.