What is "continental drip"

n. The phenomenon whereby southward-pointing landforms are more numerous and prominent than northward-pointing landforms.

Continental drip is the observation that southward-pointing landforms are more numerous and prominent than northward-pointing landforms. For example, Africa, South America, India etc. all taper off to a point towards the south. The name is a play on continental drift.

The observation was made by Ormonde de Kay in a 1973 tongue-in-cheek paper. John C. Holden expanded and illustrated his own version of the idea in 1976.

The planet simulator ( software toy) SimEarth by Maxis includes continental drip in its Terran (Earth) simulations.