Also called: Flexible thumb · Double-jointed thumb · Bendy thumb

Where on the hand: Tested by pressing the thumb's top phalange backward.

What it looks like: The nail joint bends back appreciably, sometimes to a striking arch, and springs back when released.

Generosity, adaptability, extravagance and impetuousness. Cheiro notes that such people promise things quickly but very often go back on their promises. Indian sources add high imagination, heavy spending, an artistic approach to tasks and a pleasant manner.

Western reading: Cheiro's central complaint about the supple thumb is unreliability of promises.

generous, adaptable to others, extravagant, and impetuous in their actions and decisions.Cheiro, Palmistry for All (1916)