drop out

verb

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

   “Nothing went well in high school, so he dropped out.”

   “He [Bill Gates] dropped out of a better school than I dropped out of.”

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. Used other than figuratively or idiomatically: see drop, out.

   “Generally, by the time you are Real, most of your hair has been loved off and your eyes drop out and you get loose in the joints and very shabby.”

5. To give way under someone.

   “The board he was walking on dropped out.”

6. 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.”

7. To dismiss, break up with or abandon (someone).