1. mag dump - Noun
2. mag dump - Verb
mag dump (plural mag dumps)
(firearms, slang) The act of firing at a target continuously or repeatedly until the magazine of ammunition is empty.
The act of firing an entire magazine-full of ammunition from a fully-automatic weapon in a single burst.
mag dump (third-person singular simple present mag dumps, present participle mag dumping, simple past and past participle mag dumped)
(firearms, slang, intransitive) To perform a mag dump.