Young’s Modulus is a mechanical property that measures the stiffness of a solid material.

It measures the ratio between mechanical stress \(\sigma\) and the relative resulting strain \(\epsilon\).

And so, very simply:

\begin{equation} E = \frac{\sigma }{\epsilon } \end{equation}

Thinking about this, silly puddy deforms very easily given a little stress, so it would have *low* Young’s Modulus (\(\sigma \ll \epsilon\)); and visa versa.
https://aapt.scitation.org/doi/10.1119/1.17116?cookieSet=1