The act of killing with a fragmentation grenade, or in gaming, the act of destroying an opponent.
From frag (fragmentation grenade) + -ing (gerund/present participle). The term originated in military contexts and transferred to gaming culture.
Fragging in video games is directly borrowed from a real military term, which itself was a shorthand for 'fragmentation grenade'—it's slang that traveled from battlefields to chat rooms.
Complete word intelligence in one call. Free tier — 50 lookups/day.