Territorial Reconfiguration vs Concavity/Convexité argot
The officially spun term for making Canada take U.S. terrain and letting us dump pretty much everything we don’t want onto it is Territorial Reconfiguration. Great Concavity and Grand Convexité are more like U.S./Canadian street argot that got adopted and genericized by the media.
Context
The theme's naming politics stated flat, folded in from 091's Cabinet scene (pickup 3): the state's own euphemism for coerced dispossession-plus-dumping is "Territorial Reconfiguration," while "Great Concavity and Grand Convexité" are "street argot" the media "adopted and genericized." The gap between the two vocabularies is the whole spin operation in one note — the government names the act by its bureaucratic process, the street names it by the hole it left in the map. Both sides of the border coin the same folk terms; only Washington insists on the official one.