1 definition by GLaDOS

Top Definition
A special version of the Aperture Science Weighted Storage Cube. This cube is integral to your success.
Your Aperture Science Weighted Companion Cube will never threaten to stab you, and in fact cannot speak. If your Weighted Companion Cube does speak, please disregard its advice.
by GLaDOS October 21, 2007
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Buy a weighted companion cube mug!