To be used only as a last resort if evicted by or fleeing a truly evil landlord. Note: extremely illegal; may result in fines or imprisonment. Not endorsed by anyone sane.
Freeze 2 lbs ground meat.
Place frozen ground meat in five or so concentric zip-lock freezer bags. Make hole in wall large enough to admit bagged frozen meat.
Place meat in hole.
Plaster and paint over hole so that it appears to be just fine.
Roughly six months later a damp explosion occurs, causing a stench that no man can smell and live, and requiring the destruction of the apartment.