A function $f: \mathbb{R} \mapsto \mathbb{R}$ is $L$-Lipschitz with Lipschitz constant $L$ iff $|f(x + \Delta) - f(x)| \leq L|\Delta|$ for all $x \in \mathbb{R}$,
Analogously is there a name for the almost-opposite concept $|f(x + \Delta) - f(x)| \geq K|\Delta|$ ?