fire and forget

Short definition from Wiktionary

Noun

1. 1
   A kind of missile guidance system which does not require further control after launch, and can hit its target without the launcher being in line of sight of the target.
2. 2
   The practice of transmitting or raising something, such as an event, and then proceeding without checking for any result or response.

Adjective

1. 1
   Not requiring further control, feedback, or response after an initial action, launch, etc.