The phrase "mass defection" means when a large group of people switch their loyalty, often leaving a particular organization or group to join the opposition or another group. Full definition
A top Activision executive, speaking late this week after mass defections from Modern Warfare studio Infinity Ward eviscerated morale there, defended the company's treatment of its developers, saying they're paid better under Activision than anywhere else. (kotaku.com)
The promise of early fulfillment, which seemed so tangible in America, operated to mute our native critics and prevent mass defection, at least for a long time. (religion-online.org)
There's got to be scope for mass defections from the Lib Dems to Labour if Labour can articulate a message that left - liberals feel comfortable with. (nextleft.org)