Infinite loop.

This term really belongs to recursion theory (and other very theoretical analyses of computable functions). A function which enters an infinite loop for some input is said to be undefined for that input. Since it is sometimes convenient to consider the function to "compute" the value _|_ (aka bot or eet), it's handy to say that it halts, only it doesn't. Hence "*dynamic* halt".

But I've heard the term used facetiously far more than I've heard it used seriously; draw your own conclusions...