griefing
Social GamingDefinition
Griefing is any deliberate behavior intended to ruin the experience of teammates or opponents. Examples include intentional feeding, blocking teammate abilities, sabotaging objectives, ult-baiting, and team-killing in friendly-fire games. Griefing is harder to detect than throwing because it can happen in subtle, plausible-deniability ways.
Example
"Our jungler keeps blocking my recall — that's griefing." The player is deliberately interfering with a teammate's mechanics.