topheavy

When a boat is topheavy or its center of gravity is too high, the boat is liable to capsize.

Topheavy—I expect, too much luggage on board—have another sandwich?

It was less than thirty feet away now, drifting straight past and rocking with the tide like a topheavy flatbarge.

The faces gradually show less careful drawing and working, and the figures become squat and topheavy.

If the center of gravity in a boat is too high (as illustrated in Fig. 6) the boat is said to be topheavy and unsafe.