drop out

verb

1. 1

   give up in the face of defeat of lacking hope; admit defeat

   In the second round, the challenger gave up

2. 2

   leave school or an educational program prematurely

   Many students drop out because they are not prepared for our challenging program

3. 3

   withdraw from established society, especially because of disillusion with conventional values

   She hasn't heard from her brother in years--he dropped out after moving to California