1. one-pump - Noun
2. one-pump - Verb
one-pump (third-person singular simple present one-pumps, present participle one-pumping, simple past and past participle one-pumped)
(transitive, video games, slang, Fortnite) To kill someone in one shot with a pump action shotgun.
one-pump (plural one-pumps)
(video games, slang, Fortnite) An instance of one-pumping.