The story
From kit + PvP (“player versus player”).
Etymology from Wiktionary, CC BY-SA 4.0.
KitPvP
Today it means: A Minecraft game mode where players choose from pre-set "kits" (loadouts of armor, weapons, items) and fight each other in arenas, focusing purely on combat skills (PvP) without typical survival elements, acting as a fast-paced means for battling other players. Full definition →