drop out

verb6

1. •
   To leave (school, a race, etc.) prematurely and voluntarily.

   • Nothing went well in high school, so he dropped out.
2. •
   To opt out of conventional society.
3. •
   To be lost or momentarily interrupted.

   • I can't make phone calls because the line keeps dropping out.
4. •
   To give way under someone.

   • The board he was walking on dropped out.
5. •
   (figurative) To cause someone to slip and/or fall down.

   • The ground dropped out from under him.
   • When she left him, his world dropped out beneath him.
6. •
   (slang) To dismiss, break up with or abandon (someone).