all-or-nothing

Short definition from Wiktionary

Adjective

1. 1
   Being or relating to a situation where a dichotomy (a binary state) pertains: either of two poles is instantiated, with no intermediate state (e.g., a mixture or syncretism) being possible or being permitted.
2. 2
   Being or relating to a situation where a dichotomy (a binary state) pertains: either of two poles is instantiated, with no intermediate state (e.g., a mixture or syncretism) being possible or being permitted: Being or relating to a project that will either succeed completely or fail completely.